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题型:阅读理解-单选 难度:0.65 引用次数:82 题号:10048341

In today's world, sleep experts say that for a better night's rest, Americans should turn off their smartphones or iPads before sleeping. Such electronic products make the brain more active, and then influence people's sleep. But according to a latest survey, more than 90% of Americans usually use a computer or some other kinds of electronic products in the hour before bed.

Researchers found that man-made light from some electronic products at night might reduce the levels of the brain chemicals that help sleep. The researchers showed that sitting in the light from tablets clearly reduced the levels of the chemicals which manage our body clocks and play a great role in the sleep cycle.

In the study, the researchers let volunteers read, play games and watch movies on a tablet for different time while measuring how much light their eyes received. They found that sitting for two hours before a bright tablet at night reduced the levels of the chemicals by about 22%.

Studies of students using computers at night have got the similar results. And researchers said that might not only cause sleeplessness, but also increase the risk of obesity(肥胖症), diabetes(糖尿病) and other diseases.

To be on the safe side, the researchers advise us to use computers less before bed, or turn down our screens low.

1. What can we learn from the first paragraph?
A.Americans don't get enough sleep.B.Electronic products are very popular.
C.The brain becomes more active at night.D.Sleep experts never use smartphones.
2. How electronic products influence people's sleep?
A.By making our brains more tired.B.By making our bodies weak.
C.By reducing the levels of the brain chemicals that help us sleep.D.By changing our body clocks.
3. What does the underlined word "that" refer to?
A.Making a survey about sleep.B.Using smartphones in the daytime.
C.Sitting in a bright room.D.Surfing the Internet at night.
4. What do the researchers advise us to do to have a good sleep?
A.Learn to use smartphones or iPads.B.Watch some relaxing TV programs.
C.Turn down the screens low.D.Try to sleep earlier than before.

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文章大意:本文主要是介绍如何正确洗手。

【推荐1】

You are always told to wash your hands before you eat. You know you must wash your hands after going to the bathroom. You should wash your hands many times during the day. Do you know how to wash your hands correctly?

Always use soap to wash your hands. After turning on the tap (水龙头) and wetting your hands, you can rub (摩擦) your hands with soap. Soap may not kill all the germs (细菌), but it can wash away the oil on your skin. As the oil is washed away, the germs will leave your hands and go away.

You should wash your hands for 15-20 seconds. How do you know the length (长度) of 15-20 seconds? You can sing ABC Song. By the time you get to the last note, your hands will be clean!

Rub your hands together. You can use one hand to rub the back of the other hand and then exchange two hands. You also need to rub between your fingers. Don’t forget to rub under and around your fingernails.

Maybe your hands don’t look dirty, but there are germs on them. Germs are too small for you to see. They are on your hands all the time. Many illnesses are caused by germs, so you should often wash your hands.

1. Why does the writer mention ABC Song?
A.Because it is the most popular song in the world.
B.Because everyone can sing this song very well.
C.Because washing hands is as easy as singing ABC Song.
D.Because you can sing this song to know the length of washing hands.
2. The underlined word “note” in Paragraph 3 means “________” in Chinese.
A.音符B.注释C.笔记D.便条
3. Which of the following is NOT mentioned in the passage?
A.Using soap to wash your hands.
B.Using a clean towel (毛巾) to dry your hands.
C.Washing your hands for about 20 seconds.
D.Rubbing under and around your fingernails.
4. According to the passage, you can know ________.
A.why you should often wash hands
B.what the best soap people usually use is
C.what kind of germs there are on your hands
D.how many germs there are on your hands
5. What does the passage mainly talk about?
A.How to stay healthy.B.How to protect your fingers.
C.How to wash hands correctly.D.How to keep away from germs.
2023-06-24更新 | 591次组卷
阅读理解-单选(约190词) | 适中 (0.65)
文章大意:本文主要介绍了不同的颜色所代表的不同含义,以及会给我们带来的不同感受。

【推荐2】Colors can affect (影响) our feelings, so knowing something about the colors can help us find the right colors in our homes.

It’s easy to see red in Chinese rooms. It’s our favorite color. It means happiness and luck. But if your bedroom is also red, you may not sleep well. It is an active color and makes us want to do sports.

Orange is a good color for the rooms where people usually eat. People like eating together and talking to each other in an orange room.

If you are a student, ask your parents to color your study (书房) yellow. Yellow can make you think faster and more carefully. You may be more confident (自信的) about yourself.

You may know most of the walls in the hospitals are blue. Why? Because blue can make sick (生病的) people feel relaxed. They can have a good sleep and be better soon. So use it in your bedroom and you can have a nice sleep, too.

1. What color makes you want to do sports?
A.Red.B.Blue.C.Orange.
2. Why do students like to color their study yellow?
A.Because it makes them eat more.
B.Because it makes them think faster.
C.Because it makes them be better soon.
3. What does the underlined word “They” refer to (指代)?
A.Blue walls.B.Hospitals.C.Sick people.
4. What is the best title for this passage?
A.Colors and StudyB.Colors and FeelingsC.People’s Favorite Color
2024-03-01更新 | 101次组卷
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文章大意:本文介绍了互联网的使用情况。29亿从未使用过互联网的人生活在发展中国家。在46个最不发达国家中,近四分之三的人从未上过网。
【推荐3】

Nearly 3 billion people or 37% of the world’s population have never used the Internet, according to the United Nations, although the Covid-19 pandemic drives people online.

The UN’s International Telecommunication Union (ITU) (联合国国际电信联盟) estimated (估计) that 96% of the 2.9 billion people who have never used the Internet live in developing countries.

Internet use is often unaffordable in poorer nations. Almost three quarters of people have never been online in the 46 least-developed countries. What’s worse, even among those Internet users many hundreds of millions might only go online infrequently (不流畅), using shared devices (设备) or facing connection (连接) speeds that discourage their Internet use.

The Union said the number of people who have gone online rose from 4.1 billion in 2019 to 4.9 billion in 2021, partially (部分) because of a “Covid connectivity boost” (互联互通增加). “ITU will work to make sure no one will be left behind,” said the ITU secretary general, Houlin Zhao. “Poverty, illiteracy (文盲), limited electricity offer and few digital skills continued to challenge the ‘digitally excluded’ (数码排斥者).” he added.

1. What’s the number of the people who never use the Internet?
A.over 3 billion.B.more than 37% of the world’s population.
C.About 2.9 billion.D.4.9 billion.
2. What’s the meaning of the underlined word in Paragraph 2?
A.不流畅的B.不可连接的C.无信号的D.负担不起的
3. From 2019 to 2021, the number of Internet users was increase by _________.
A.0.8 billion.B.2.9 billion.C.4.1 billion.D.4.9 billion.
4. What discourage people in least-developed countries to use Internet?
①They go online frequently.                     ②They have to use shared devices.
③They have to face connection speeds.        ④They can’t read and write.
A.①②B.②③C.③④D.①④
5. Which of the following is NOT true according to the text?
A.The world’s population is about 8 billion.
B.The Covid-19 pandemic makes people online.
C.All the people who have never used the Internet live in developing countries.
D.The ITU’S object is to make everyone be Internet users.
2022-12-02更新 | 89次组卷
共计 平均难度:一般