1. What are the speakers going to do?
A.Go to the supermarket. | B.Have a picnic. | C.Take a trip. |
A.Have a shower. | B.Have breakfast. | C.Get the chairs out of the car. |
A.In the early morning. | B.Around midday. | C.In the late afternoon. |
A.The umbrella. | B.The sandwiches. | C.The gas. |
2 . Not unlike the wings of airplanes, the blades (叶片) of wind turbines (涡轮机) need to be kept ice-free in order to function properly. Scientists have now developed an inexpensive method of using drones (无人机) to apply an eco-friendly anti-icing coating (涂层) to those blades.
If too much ice builds up on wind turbine blades, they will turn more slowly, producing less energy. What’s more, if an equal amount of ice isn’t present on all three blades, the turbine’s balance may be thrown off, leading to increased wear and possibly even disastrous failure.
There are anti-icing heating systems that can be built into the blades, but these may be beyond the financial means of many wind farm (风电场) operators. The same can be said for using helicopters to apply ice-prevention chemicals.
Seeking a more economical but still effective alternative, scientists from two branches of Germany’s Fraunhofer research group recently started looking to drones. The research project is known as “TURBO: Temporary coating by means of drones — Icing protection of wind turbines as a case study”.
In the current version of the resulting system, a hexacopter drone is equipped with a small pump that delivers anti-icing liquid. The liquid is sprayed (喷洒) at high pressure — which is just 0. 3 mm wide — producing tiny droplets with a diameter of 100 micrometers.
Using this setup, the drone has successfully been used to apply coatings of the droplets onto the edges of wind turbine blades, even at wind speeds of up to 35 km/h (22 mph). Once solidified (固化/凝固), those coatings prevent ice formation for several weeks before a fresh coating is applied.
The scientists are now seeking industry partners to help commercialize (商业化) the TURBO technology. It could also find use in the maintenance (维护) of power lines, the upper levels of tall buildings, or other things that are difficult to reach by conventional means.
1. What is paragraph 2 mainly about?A.Problems caused by icing. | B.The process of ice formation. |
C.Disasters brought about by drones. | D.The function of wind turbines. |
A.Ineffective. | B.Unnecessary. | C.Expensive. | D.Dangerous. |
A.It has a wider range of applications. |
B.It is a relatively traditional approach. |
C.It can solve the problem once and for all (一劳永逸). |
D.It is more costly than using ice-prevention chemicals. |
A.The Advantages of Using Wind Energy |
B.Drones Protect Wind Turbines From Icing |
C.Wind Turbines Remove Ice on Their Own |
D.A Major Breakthrough in Drone Technology |
3 . I have had no interest in football for as long as I can remember. While my classmates played, I
But occasionally, whether in a taxi or when meeting a friend's father, I found myself faced with a
I realized that my
Then I became a father. I didn’t want my boy to
During one victorious match, we even met David, the Captain, who happily
A.preferred | B.intended | C.wished | D.pretended |
A.believed | B.understood | C.noticed | D.hid |
A.confused | B.poisoned | C.defended | D.preserved |
A.doubt | B.smile | C.confidence | D.dislike |
A.well-informed | B.well-prepared | C.well-meant | D.well-presented |
A.challenge | B.disturb | C.amuse | D.disappoint |
A.attitude | B.personality | C.interest | D.habit |
A.otherwise | B.ever | C.still | D.therefore |
A.loser | B.fan | C.outsider | D.passer-by |
A.go wild for | B.turn away from | C.get the hang of | D.miss out on |
A.agreement | B.conversation | C.competition | D.connection |
A.stressed | B.engaged | C.successful | D.busy |
A.cheer | B.change | C.vote | D.play |
A.danced | B.waved | C.posed | D.clapped |
A.Gradually | B.Finally | C.Unexpectedly | D.Luckily |
The Yinxu Museum opens in Anyang, Henan province, to display the brilliance of the 3,000-year-old Shang civilization.
Nearly 4,000 unearthed cultural relics are displayed in the museum. More than three quarters of these have never been
The Yinxu Ruins,
Many key breakthroughs
These discoveries further displayed a grand picture of a capital city
5 . “Having the world at our fingertips” is a metaphor often used when we put our hands on information technology, like smartphones and computers. This is a good metaphor. But what is much better is how we use our hands to make things done.
Put one hand flat on a surface, palm down, and you might be able to make out the outline of 14 short bones in your thumb and fingers, in addition to 5 longer ones in your palm that are jointed to your wrist. These bones give each hand its rigid, knuckled structure. Together they’re critical components of the anatomical (解剖的) architecture that allows your hand to move. At each of your fingertips there’s an ever-growing, translucent plate of fibrous protein, otherwise known as a nail. Although they’re nice for decoration, your nails protect and enhance your sensitivity to touch, too.
Imagine squeezing a piece of paper between your thumb and index finger, for example. We use this type of forceful pad-to-pad precision grasping without thinking about it, and literally in no time. Yet it was a breakthrough in human evolution. Other primates (灵长目动物) exhibit some kinds of precision grasps in the handling and use of objects, but not with the kind of efficiency that our hand does.
With a unique combination of traits, the human hand shaped history. No question, stone tools couldn’t have become a keystone of human technology without hands that could do the job, along with a nervous (神经的) system that could regulate and coordinate the necessary signals. Even for those who have never attempted to make a spear tip or arrowhead from a rock, it’s obvious that it would require strong grasps, constant rotation and repositioning, careful strikes with another hard object. And even for those who have done so, it can be a bloody business.
Of course, the most common object that people touch nowadays is a screen. And the tap-tap-tap movement of our fingers is a unique human ability, as no other primate can move their fingers as rapidly and independently as we do. Here again, we can thank the extraordinary human brain given that normal finger tapping requires the functional integrity of different parts of our central nervous system.
1. What does paragraph 2 mainly talk about?A.The structure of human hands. | B.The function of human hands. |
C.The movement of human hands. | D.The number of bones in human hands. |
A.Because they make our hands more beautiful. |
B.Because they help us hold things more tightly. |
C.Because they are a necessary part of the structure of our hands. |
D.Because they protect our fingers and increase our sense of touch. |
A.Detect. | B.Produce. | C.Integrate. | D.Interpret. |
A.introduce the structure and function of human hands |
B.compare the differences between human hands and primates’ hands |
C.emphasize the importance of human hands in history and modern technology |
D.show how the human brain contributes to the unique ability of finger tapping |
6 . She could have just quit. The race was long
“I wanted to show people that in life,
Bou Samnang participated in the women’s 5,000-metre race on May 8 at the Southeast Asian Games, which Cambodia hosted for the first time. “I knew I was
Bou Samnang’s
A.delayed | B.arranged | C.canceled | D.decided |
A.around | B.alone | C.away | D.again |
A.inspiration | B.companion | C.genius | D.designer |
A.in case | B.now that | C.even though | D.if only |
A.all the same | B.as a result | C.in the meanwhile | D.in actual fact |
A.turn back | B.set down | C.give up | D.switch over |
A.leaving | B.losing | C.changing | D.coming |
A.enter | B.organize | C.lead | D.abandon |
A.represent | B.explore | C.improve | D.promote |
A.encouragement | B.kindness | C.gratitude | D.entertainment |
A.beside | B.without | C.behind | D.against |
A.tourists | B.volunteers | C.fans | D.athletes |
A.tent | B.flag | C.status | D.flower |
A.beauty | B.creativity | C.intelligence | D.determination |
A.guaranteeing | B.instructing | C.warning | D.reminding |
1.表示安慰;
2.展览时间、地点;
3.观展感受和收获。
注意:
1.写作字数应为80个左右;
2.可以适当增加细节,以使行文连贯。
Dear Victor,
I hope this letter finds you in a better state of health.
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________1. What is the aim of the campaign?
A.To remind people of Earth Day. |
B.To encourage people to reduce garbage. |
C.To warn people of the bad effects of pollution. |
A.Planting trees. | B.Designing posters. | C.Collecting garbage. |
A.Paint paper. | B.Stop driving cars. | C.Decorate classrooms. |
A.Absurd. | B.Hollow. | C.Practical. |
9 . Things To Remember On Your First Solo Travel Adventure
If you’ve ever thought about just taking a trip yourself instead of waiting for someone to join you, you’re not alone.
Don’t be afraid to talk to random people. Though there is someone who poses a threat, it’s important to remember that not everyone is out to get you.
It’s okay to have bad days.
It’s okay to start small.
A.You are the boss of your own adventure. |
B.You need to make an unusual travel choice. |
C.It’s no secret that solo travel is on the rise. |
D.Sometimes things can go incredibly wrong. |
E.People like you simply don’t know how to start. |
F.Most of the time people are just curious and try to be friendly. |
G.Remember, your first solo trip doesn’t have to be to a whole other continent. |
10 . Global warming is not only bringing rising sea levels and extreme weather events but also causing a growing wave of climate anxiety around the world. An international study found nearly six in ten people were very worried about climate change, while the young appeared to be particularly badly influenced.
It is important to be aware of your own limitations. You alone can’t stop or undo climate change, so you needn’t place the responsibility on yourself.
Talk therapy (谈话疗法) provides you with a chance to discuss your anxiety about climate issues. A good therapist will address your negative emotions and thoughts about the environment in your conversations.
Positive changes have taken place at personal, community, and worldwide levels. And there is no reason to believe that they won’t continue, especially with your help. You can discover means to influence others with your own positive attitude.
A.However, you can always find ways to contribute positively. |
B.Staying in natural green spaces has been shown to reduce stress. |
C.For example, organize related activities to educate people around you. |
D.Reduce your time spent online, especially on sources that are not trustworthy. |
E.The UN has made a list of blogs and other news resources about climate issues. |
F.Such a professional will recognize your feelings and work with you to manage them. |
G.So consider taking care of your mental well-being if you are struggling with the issue. |