Using natural and organic products for skincare is increasingly popular-and that includes suncream. Many websites, including Pinterest and Instagram, feature users' recipes for homemade suncream. Judging from the comment, the rise in interest for homemade suncream is because some people fear the chemicals in shop-bought suncream and believe that natural products mixed at home will be better at protecting them from the sun's harmful rays. The fear originates from recent news that some suncream elements seem to disturb hormones (荷尔蒙).
Many of the homemade suncream recipes contain elements like shea butter and cocoa butter as well as coconut and vitamin E oils. The sun protection factor (SPF) values for these elements, according to the authors of these recipes, are between four and six. These SPF values, if true, are not enough to protect the skin against the harmful effects of sunlight. Some recipes include carrot seed essential oil, which the authors claim to have an SPF of 35-40. But this is unlikely, given the small amount used in these recipes. The European Commission recommended SPF factor for moderate skin protection is 15-29 (and 30-50+ for high protection).
The sun's most harmful rays are ultraviolet (UV) radiation-notably UVB and UVA radiation. UVB has a shorter wavelength and doesn't go far into the skin, but it is very dangerous as it can change the DNA in skin cells and cause skin cancer. UVA has a longer wave- length and can go much deeper into the skin. UVA can cause harmful reactive oxygen molecules (分子)called “free radicals” to form. These molecules can damage fat, protein and DNA in the skin, thereby weakening the normal function of skin cells.
Shop-bought suncream contains approved UV-blocking molecules that block UVA and UVB rays. Zinc oxide (氧化锌)is one of these UV-blocking materials. It has been extensively tested to determine the most effective size for blocking harmful rays. It is not clear whether the zinc oxide powder recommended for the homemade recipes meets with the recommended size or proportion needed.
1. What may concern consumers of the shop-bought suncream?A.The price of it. | B.The hormones in it. |
C.The chemicals in it. | D.The production process of it. |
A.Measuring the amount of chemicals in suncream. |
B.Measuring the harm suncream do to people. |
C.Measuring the hormone level of suncream. |
D.Measuring the protective effect of suncream. |
A.How sun protection products work. |
B.What harm the sun's rays bring to skin. |
C.How the sun's most harmful rays form. |
D.How UVB and UVA radiation can be blocked. |
A.Shop-bought suncream needs more tests. |
B.More zinc oxide powder is beneficial to skin. |
C.Shop-bought suncream is more suitable for people. |
D.More chemicals will be added into shop-bought suncream. |
相似题推荐
【推荐1】You know the drill when it comes to losing weight: take in fewer calories and burn more calories.
Eat in front of mirrors and you'll lose weight
One study finds that eating in front of mirrors reduces the amount people eat by nearly one third. Having to look yourself in the eye reflects back some of your own inner standards and goals.
Sniff a banana or an apple when you feel hungry
Whether that's a floor, a couple of windows, or your car, a 150-pound person will burn about four calories for every minute spent cleaning. Scrub for 30 minutes and you could work off approximately 120 calories, the same number in a half-cup of frozen yogurt.
Start at the color blue
There's a good reason you won't see many fast-food restaurants decorated in blue: it helps to control an appetite. So serve up dinner on blue plates, dress in blue while you eat, and cover your table with a blue tablecloth.
A.You might feel silly, but it works. |
B.Therefore, adjust your eating habits. |
C.Wash something thoroughly once a week. |
D.That's all it takes to lose as many pounds as possible. |
E.On the contrary, avoid red, yellow, and orange in your dining areas. |
F.In other words, it reminds you of why you're trying to lose weight in the first place. |
G.But you also know that most diets and quick weight-loss plans don't work as promised. |
【推荐2】Some recent surveys show that the health conditions of many white collar employees and office workers are rather critical. Death cases among white collar employees and office workers are increasing year by year and these cases are generally believed to have been caused by overwork and spend little time taking rest or doing exercise.
If their offices are within the distance of half an hour’s walk, some office workers now choose to go to work on foot. Ms. Deng, who works in a foreign enterprise in Beijing, has been walking to her office for more than six months now. “I usually have a tight work schedule and can’t find time to do exercise. So I choose to walk to work.” As she said, if the office is not far from home, most women would like to go to work on foot. Walking is good for their health and can help them to keep good figures as well.
Apart from walking to office, one can also find time to do exercise when one is at work. The simplest way is to abandon the lift. Mr. Wei, who works in the Passenger Service Department at Shenzhen Airlines, is one of such men who frequently climb stairs to his office. “I only use the lift whenever I’m with my colleagues or my boss. Otherwise, I would climb stairs instead of taking the lift.”
In addition, some office workers try to find time to go to a gym at the end of a day. Ms. Sang works in a law firm in Shenzhen. She goes to the gym several times a week when she has the time. “I go to the gym every weekend. During the weekdays, I will also go there whenever I have the time.” Ms. Sang and her husband both have a gym membership card for a whole year. The cards cost them 3,000 yuan. However they think it’s worth it.
1. Why are death cases among white collar employees and office workers increasing year by year?A.Because they overwork for a long time. |
B.Because they are too busy to have time for a rest. |
C.Because they hardly have time to do exercise after work. |
D.All of the above. |
A.3 | B.4 | C.5 | D.6 |
A.Then, what shall office workers do next to prevent death cases? |
B.What will happen to office workers? |
C.In order to keep themselves healthy, some office workers now take measures as follows: |
D.Working on foot is the best way for office workers. |
A.Health Is Very Important | B.Office Workers Try to Keep Healthy |
C.How to Keep Healthy | D.Office Workers’ Trouble |
【推荐3】What you do after studying could have a big effect(影响)on how well you learn and remember. Today on Education Tips, we will explore two no-cost ways that can help you improve your learning: wakeful rest and sleep.
When many students finish studying, they often go straight to another activity. Perhaps they look at their phone or computer. They might even play a video game or watch television. But research suggests that resting after your study may help you remember what you have studied.
The basic idea is this: by stopping your activity after the study, your brain gets a chance to rest. Resting is difficult when you are playing computer games.
While this might sound unusual to you, many studies have explored the benefits(好处)of resting after learning —what is called “wakeful rest”.
A 2019 study found that both young and older adults were able to better remember information they learned after doing wakeful rest.
If you want to give “wakeful rest” a try, here are a few simple things to do. Rest quietly for five to ten minutes. Do not look at your phone, read stories or play games. It is really that easy!
Besides wakeful rest, sleep is also important for learning. The Division of Sleep Medicine at Harvard Medical School(HMS) notes that sleep helps people to learn in two ways. A report on the school’s website explains that “a sleep-deprived(剥夺)person cannot focus attention well and therefore cannot learn well”. It also says, “Sleep itself helps us to memorize and that memorizing is very important for learning new information.”
The National Sleep Foundation(NSF) suggests that adults between the ages of 20 and 64 get between 7 and 9 hours of sleep per day. Teenagers may need a little bit more, and people over the age of 65 may need a little less.
Try to get some “wakeful rest” after a study. Then try to get a good night’s sleep. That’s it —a simple, no-cost way to help you remember what you learn.
1. Which activity might be recommended shortly after studying?A.Reading a newspaper. | B.Playing a video game. |
C.Sitting there doing nothing. | D.Having a nice sleep at night. |
A.The importance of sleep. |
B.The good ways to get a rest. |
C.The reason for having a rest |
D.The types of resting activities. |
A.Less than 7 hours. | B.Just 7 hours. |
C.No more than 9 hours. | D.Around 9 hours. |
A.Low-cost Tips on Working |
B.Good Things to Do After Your Study |
C.Why Do We Need to Have a Good Sleep? |
D.How Long Should We Rest After Learning? |
【推荐1】What do you usually do to comfort your friends when they are sad? You probably pat them on the shoulder, or give them a warm hug.
We used to think that knowing when and how to comfort others was an ability that only humans have. But scientists have discovered that apes (猩猩) have this ability too.
Two researchers from Emory University in Atlanta, US, went to an Ape Protection Centre in Congo to study bonobos (倭黑猩猩), which are closely related to humans.
The researchers analyzed the bonobos’ reactions (反应) after more than 370 cases of stressful situations, such as fights and losing temper, and found that some bonobos rushed to hug those that were screaming after being attacked, just like humans would have done.
However, researchers found that not all bonobos were able to comfort others. In the protection center, many bonobos are orphans whose mothers were killed by hunters. They were found to be more worried in times of tension and have greater difficulty controlling their own emotions, making them worse at reaching out to help friends in need.
“Orphans, who have not had the benefit of a mother helping them handling their emotions, are much worse at comforting others,” Professor Frans de Waal told The Telegraph. “Bonobos with moms were able to curb their negative emotional reactions more quickly. Therefore, they pay more attention to others.”
This pattern mirrors the way that human children have been found to react. Those who are good at handling their own emotions—for example, those who can calm themselves down more quickly after upsetting experiences—are usually better at expressing their concerns for others.
1. What ability the scientists have discovered about apes?A.They know when and how to comfort others. | B.They know how to make a meal |
C.They can hide away. | D.They have friendship. |
A.express | B.watch | C.hide | D.control |
A.Orphan bonobos never give a hand to friends. |
B.There were 370 bonobos in the research. |
C.Moms play an important role in dealing with kids’ emotions. |
D.Only human beings have the ability to comfort others. |
A.To provide better protection for Apes. | B.To inform readers of a new study. |
C.To uncover the mystery of Apes. | D.To compare human behaviors with Apes’ |
【推荐2】More than 2,000 years ago, when the last shovelful(一铲) of dirt fell on the Tarracotta Warriors, it was thought that they would never see the sunlight again and would spend the rest of their “lives” guarding and protecting the first Chinese emperor, Qinshihuang, who died in 210 BC.
But things got better off these clay soldiers. Ever since they were discovered in Xi’an in 1974,by a group of farmers; they’ve been able to see the bigger world-traveling from one museum to the next.
They are now on display in New York at Discovery Times Square, reported the New York Times.
However, the story doesn’t end here. The roughly 2,000 soldiers found so far are estimated to be only one quarter of the total number. Moreover, scientists haven’t yet dared to touch the central tomb, which is believed to contain the body of the emperor himself.
“Partly it’s out of respect for the elders,” explained Kristin Romey, consultant for the exhibition. “But they also realize that nobody in the world right now has the technology to properly go in and excavate(挖掘) it.”
This is true. According to ancient writings, the emperor’s tomb is circled by rivers of liquid mercury(水银) which is highly poisonous but can keep the body in good condition. Studies of the soil around the tomb also found a large amount of mercury. This makes exploring the tomb very dangerous.
The other reason that scientists have been hesitating is that they are afraid of the damage they might cause by opening the tomb.
“When we began excavating ‘the soldiers’, the minute they were exposed to air and sunlight, the pigment(颜料) just flaked off (剥落),” Romey told the Fox News.
But he believes that the solution will come when science advances. Perhaps a visual robot can be sent into the tomb first to investigate and help figure out the best way to protect it.
In the end, scientists and historians must weigh their desire to know against the damage their digging might cause. “Archaeology, ultimately (最终),is a destructive science,” Romey said. “You have to destroy stuff in order to learn about it.”
1. What is the point of the article?A.To tell about the mysteries of Qinshihuang’s tomb. |
B.To analyze why archaeology is a destructive science. |
C.To explain the risks of further excavating Qinshihuang’s tomb. |
D.To introduce the Terracotta Warriors exhibition in New York. |
A.The decision whether to open the tomb or not is likely to be influenced by the pace of technological progress. |
B.It is estimated that about 10,000 clay soldiers were buried with Qinshihuang in his grave. |
C.The highly poisonous mercury was used by Qinshihuang to keep away those who attempt to destroy his tomb. |
D.Scientists won’t excavate Qinshihuang’s tomb until they think of a good way to preserve the body of the emperor. |
A.settle down | B.arrange |
C.take over | D.explore |
A.They should respect the ancient world during their work. |
B.They should balance the value and damages of their work. |
C.They should always take their own safety into consideration. |
D.They should have a continuous desire to know new things. |
【推荐3】Different weather makes people feel different. It influences health, intelligence (智力) and feelings.
In August, it is very hot and wet in the southern part of the United States. People there have heart trouble and other kinds of health problems during this month. In the Northeast and the Middle West, it is very hot at some times and very cold at other times. People in these states (州) have more heart trouble after the weather changes in February or March.
The weather can also influence intelligence. For example, in a 1983 report by scientists, IQ (智商) of a group of students was very high when a very strong wind came, but after the strong wind, their IQ was 10% lower. The wind can help people have more intelligence. Very hot weather, on the other hand, can make it lower. Students in many schools of the United States often get worse on exams in the hot months of the year (July and August).
Weather also has a strong influence on people’s feelings. Winter may be a bad time for thin people. They usually feel cold during these months. They might feel unhappy during cold weather. But fat people may have a hard time in hot summer. At a-bout 18℃, people become stronger.
Low air pressure (气压) may make people forgetful (健忘). People leave more bags on buses and in shops on low-pressure days. People feel best at a temperature of about 18℃.
Are you feeling sad, tired, forgetful, or unhappy today? It may be the weather’s problem.
1. What can cause problems on health?A.Hot and wet weather | B.A strong wind |
C.Warm weather | D.Low air pressure |
A.rain | B.a strong wind |
C.very hot weather | D.low air pressure |
A.hot and cold weather influences all people in the same way |
B.weather influences people’s behaviour |
C.IQ changes when weather changes |
D.people feel good on low pressure days |
A.Hot Weather Causes Health Problems. |
B.Different Weather Makes People Feel Bad. |
C.Weather Influences Feelings. |
D.Weather Influences Health, Intelligence and Feelings. |
Winners are great at overcoming problems. For example, if you were late because your car broke down, maybe you need to have your car examined more regularly. Or, you might start to carry along with you the useful phone numbers, so you could call for help when in need. For another example, if your colleague causes you problems on the job for lack of responsibility or ability, find ways of dealing with his irresponsibility or inability rather than simply blame the person. Ask to work with a different person, or don’t rely on this person. You should accept that the person is not reliable and find creative ways to work successfully regardless of how your colleague fails to do his job well.
This is what being a winner is all about—creatively using your skills and talents so that you are successful no matter what happens. Winners don’t have fewer problems in their lives; they have just as many difficult situations to face as anybody else. They are just better at seeing those problems as challenges and opportunities to develop their own talents. So, stop focusing on “whose fault it is.” Once you are confident about your power over bad situations, problems are just stepping stop on for success.
1. According to the passage, winners .
A.deal with problems rather than blame others |
B.meet with fewer difficulties in their lives |
C.have responsible and able colleagues |
D.blame themselves rather that others |
A.ask a more able colleague for help |
B.blame him for his lack of responsibility |
C.tell him to find the cause of the problem |
D.find a better way to handle the problem |
A.excuses for their failures | B.barriers to greater power |
C.challenges to their colleagues | D.chances for self-development |
A.A Winner’s Problem. | B.A Winner’s Secret. |
C.A Winner’s Opportunity. | D.A Winner’s Achievement. |
【推荐2】Suppose you have everything: a good job, good health, good relationships and a lot of money. But still there is something missing from your life. Guess what? The love. It is not something that you should ignore. Life without love is just like a body without soul.
Love gives meaning to life as without love life is meaningless. Lucky is the person who gets love and keeps the flames of love burning forever. It is not a matter of days or months. Love is for life and life is for love
It is easy to fall in love but difficult to keep the flames of love burning. Before having serious long - term love relationships, be sure that the person you love is also sincere with you. A selfish person can make your life terrible. If this is the case with you then try to get rid of that person as soon as possible.
Most people do not give importance to their love life as they give importance to their professional life. This is a bad choice which ruins the whole life. A balance between the two is necessary in order to enjoy life in its entirety. Do not lose the love you need.
In order to make your life more exciting and enjoyable, you need a loving and caring person with whom you can share your values, dreams, joys and jokes. In difficult times of failure, pain, or loss of dear ones, this person should stand firm beside you and comfort you in every possible manner.
Love your life and love the person who is in your life. Keep the flames of love burning to live a great life.
1. What's the meaning of the underlined sentence in the second paragraph?A.Love is only for life |
B.Life is designed only for love |
C.Life is not separated from love |
D.When you have a good life, you can own a real love |
A.try to get rid of your bad manners as soon as possible |
B.make sure that the person you love is also sincere |
C.try to find out whether the person you love really loves you |
D.make sure that you treat the person sincerely |
A.to value everything one has | B.to be sincere with the people around |
C.to live a life full of love | D.to avoid being a selfish person |
A.To fall in love with a person |
B.To find a real person loving you. |
C.To make the flames of love burning forever |
D.To keep good relations with friends. |
【推荐3】At heart, parents always wish the best for their children, and they work hard for that. Nowadays, we see parents deciding the schools for their little ones before the baby is even born. Once kids start going to school, some parents want to have a time-to-time update of their kid's activities. They want to come to the classroom every day, keep an eye on whom they talk to, know the friends they keep, start telling them how to do their job, and keep talking or giving a feedback(反馈) to them about everything under the sun. Besides, they send their kids for extra hobby classes, as they want their children to do best in every field.
When it comes to the education, super mom and dad have all the plans made for their children, and I am sure that they have come up with the best. So, try to fight for the dreams that your parents have set for you. However, in some cases, it may happen that the kids have some different dreams. Parents sometimes don't even consider the choice of their kids and may force them to do what they wanted to do in life. It's good to plan the future for the children, but leave at least some decisions to them.
So what should the children do? First, hear out all the plans that your parents have made for you. If you have some different ideas, then sit down and talk to your family about it. Be patient and respect their decisions, but put your plan forth, and make them understand what you want to do and why. Many times, you are not aware of the difficulties that you may have to face while pursuing your dreams. Ask your parents for suggestions, which will make them feel good and involved. That way, they may support you if you are going on the right path.
1. The parents described in Paragraph 1 tend to .A.have a good understanding of their children |
B.worry a lot about their children |
C.take good care of their children |
D.expect too much from their children |
A.children to do as they are told |
B.children to turn a deaf ear to their parents |
C.parents to respect their children’s choices |
D.parents to do everything for their children |
A.going after | B.planning for |
C.adapting to | D.preparing for |
A.Opposed | B.Doubtful |
C.Uncaring | D.Supportive |
【推荐1】There is an English saying, “Laughter is the best medicine.” Until recently, few people took the saying seriously. Now, however, doctors have begun to look into laughter and the effects it has on the human body. They have found that laughter can really improve people’s health.
Tests were carried out to study the effects of laughter on the body. People watched funny films while doctors checked their heart, blood pressure, breathing and muscles. It was found that laughter has similar effects to physical exercise. It increases blood pressure, the heart beating and breathing; it also works several groups of muscles in the face, the stomach, and even the feet. If laughter exercises the body, it must be beneficial.
Other tests have shown that laughter appears to be able to reduce the effects of pain on the body. In one experiment, doctors produced pain in groups of students who listened to different radio programs. The group that tolerated the pain for the longest time was the group which listened to a funny program. The reason why laughter can reduce pain seems to be that it helps to produce a kind of chemicals in the brain which decrease both stress and pain.
As a result of these discoveries, some doctors in the United States now hold laughter clinics, in which they help to improve their patients’ condition by encouraging them to laugh. They have found that even if their patients do not really feel like laughing, making them smile is enough to produce beneficial effects similar to those caused by laughter.
1. We learn from the first paragraph that laughter______.A.is good for one’s health | B.is related to some illness |
C.has been investigated | D.has no effect on the body |
A.It reduces pain. | B.It exercises the body. |
C.It reduces stress. | D.It can cure cancer. |
A.laugh at their patients | B.encourage their patients to laugh |
C.smile when they don’t feel like laughing | D.never stop laughing |
A.Critical. | B.Doubtful. | C.Positive. | D.Negative. |
【推荐2】Cycling on Ireland’s West Coast
Don’t worry if you’re not a sporty kind. Our cycling trip is relaxing and easy. The leader drives a car which carries your bags and provides support if needed. But remember you should ride with group members. The group size is usually 9-12.
DAY 1 — The Cliffs of Moher (莫赫悬崖)
Cycling a relaxed 32 km on our first day, we visit Ennistymon, a fine example of an Irish country town with many coloured shop fronts and traditional stone buildings. Then we continue to the seaside towns of Lahinch and Liscannor before we climb to the top of the Cliffs of Moher. These are some of the highest sea cliffs in Europe. The day ends in Doolin, where three pubs (酒吧) play the best Irish music!
DAY 2 — The Burren National Park
Covering 48 km on our second day, the highlight (最精彩的部分) is a wonderful coastal ride with the Atlantic Ocean on one side and the hills of the Burren on the other. On our way we stop at the lovely beach at Fanore. The day ends at Ballyvaughan, a pretty village on the coast, from where we plan to visit the Ceile in Kilfenora — the home of Irish dancing.
1. What should you do if you take part in the activity?A.Be strong enough. | B.Have a competitive spirit. |
C.Cycle with group members. | D.Carry everything on your bike. |
A.Doolin. | B.Lahinch. |
C.Liscannor. | D.Ennistymon. |
A.Ride more. | B.Play Irish music. |
C.Climb the sea cliffs. | D.Have a night at Fanore. |
【推荐3】All networks like 3G and 4G will be things of the past, because 5G will be reachable in the near future. So, what’s so special about a 5G future? First of all, its download speed can be as fast as 20GB/s, which is 100 to 200 times that of 4G. But what’s more impressive is 5G’s low delay rate. Now, 4G takes an average of 200 milliseconds(毫秒) to send and receive information. But 5G will get it down to 1 millisecond.
5G is a great breakthrough. It’s going to change the way equipment connects to the Internet, and more importantly, to each other. And self-driving cars may be one of the biggest breakthroughs to come out of 5G. Human reaction time is 200 milliseconds, yet we still have accidents every day. The self-driving car under a 5G network could react and communicate its reaction to hundreds of cars around it, all within 1 millisecond. It’ll play a great role in preventing car accidents and ending traffic jams completely.
5G can benefit us in many other ways.Operations could be performed by robots controlled by experts from the other side of the world. Therefore, more lives will be saved in time. Factories can be staffed by robots that can communicate their tasks to each other, and they can do more work efficiently over a 5G network. Imagine a group of drones(无人机) flying over a field of crops, using sensors(传感器) on the ground to sort, pick, feed, and water plants all on their own. Then farmers won’t have to work so hard anymore.
However, 5G is not perfect. One major disadvantage has to do with why it’s so fast. 5G uses the millimeter waves, while 4G uses the 15 to 40 centimeter-long waves. And shorter waves go fast but not very far.On 4G networks, the signal can go 10 kilometers. But the 5G signal can go at most 300 meters, and it can’t even go through walls or rain. So, what does that mean? Having such a short signal distance means we need to build a lot of transmitters(信号发射塔) in the future.
1. How does the author show us 5G’s advantages in Paragraph 1?A.By giving examples of the uses of 5G. |
B.By making comparisons between 4G and 5G. |
C.By explaining the scientific principles of 5G. |
D.By analyzing 5G’s development from 4G. |
A.cause more car accidents |
B.slow down 5G’s development |
C.run without being connected to the Internet |
D.have a much faster reaction speed than humans |
A.Be built by robots. |
B.Have robots as workers. |
C.Offer employees home robots. |
D.Produce more medical robots. |
A.The main weakness of 5G networks. |
B.How to make 4G networks more perfect. |
C.The types of long waves and short waves. |
D.How to improve the signal of mobile phones. |