Computers and mobile phones, though they are ...

Computers and mobile phones, though they are indeed making our life ____ and more ____, have reduced the need for face-to-face communications.

A. easily; efficient　　　 B. easier; efficient　　 C. easy; efficiently　　　　 D. easily; efficiently

高二英语单项填空中等难度题查看答案及解析

Computers and mobile phones, though they are indeed making our life ___ and more ___, have reduced the need for face-to-face communications.

A easily; efficient          B easier; efficient

C easy; efficiently          D easily; efficiently

高二英语单项填空中等难度题查看答案及解析

Blue light before bedtime can make it harder to sleep, and the screens on phones, computers, and televisions send out plenty of blue light. This is all true. But if you're focused on blue light as a major problem affecting your sleep or your eye health, it's time to look at it from another aspect.

As Philip Yuhas, a professor of vision, writes at The Conversation, blue light isn’t a uniquely technological evil. It's part of sunlight, and your eyes are exposed to plenty of it all the time. You ' re fine. There are studies in mice that have found blue light can damage their eyes, but mice are nocturnal creatures (夜行动物) whose eyes are different from ours. The pigments (色素) and the lenses (晶状体) of our eyes actually block blue light fairly well--so in a sense, we already have built-in blue blocking protection

Adding more protection isn't likely to help though. You can buy glasses and screen filters (滤光片) that block blue light, but Yuhas points out they are probably a waste of money: these products do not block out much blue light. The leading blue-blocking anti-reflective coating, for example, blocks only about 15% of the blue light that screens send out. You could get the same reduction just by holding your phone another inch from your face.

The American Academy of Ophthalmology doesn't recommend blue-blocking products, either. Instead if you're concerned about your eye health or your ability to get to sleep on time, you already know what to do:

Put the screens away at bedtime. Read a book or find something else to do. While you're using screens take a 20-second break every 20 minutes to look at something 20 feet away ( the "20-20-20 " rule ). If you get dry eyes when you look at screens for a long time, use eyedrops labeled artificial tears.

1.What do people think of blue light generally?

A.It is a necessary part of sunlight. B.It is magical and rare.

C.It is the major factor affecting sleep. D.All electronics send out blue light.

2.What did the studies in mice find?

A.Mice can see clearly in the dark. B.Our eyes actually block blue light well.

C.Eyes can be long exposed to blue light. D.Blue light can damage mice's eyesight.

3.What can we know about blue-blocking products?

A.They block only 15% of the blue light. B.Few have much effect on the blue light.

C.They can prevent much harmful lights. D.They are thought highly of by experts.

4.What could be the best title for the text?

A.How can Blue Light Be Prevented? B.Why does Blue Light Make Sleeping Hard?

C.Are Blue-blocking Products Necessary? D.What will Blue Light Affect Actually?

高二英语阅读理解中等难度题查看答案及解析

Every year mobile phones develop. Imagining what they will look like and be able to do in 2020 is really a challenge. To help, experts have outlined three major mobile trends that they believe will have become reality by then.

Our phones will be so smart in 10 years’ time that they’ll know everything about our situation and warn us when something needs our attention. This is the top prediction of both Nokia and Google. They predict that our cars and home appliances will be able to communicate with our mobile. For example, fridges will tell your mobile to tell you to pick up milk on the way back from work. While driving, your mobile will suggest that you take a different route because there’s a road accident up ahead.

The second trend is in gesture-based controls. People who know the iPhone’s touch-sensitive screen are already familiar with the technology. It translates hand movements into actions on-screen. But gestural communications will make the phone more convenient to use and may completely replace touchpads. According to industry insiders, the most immediate step forward in gestural technology will be in voice recognition. It’s believed voice recognition technology will speed up communications. It is quicker to speak than type. Eventually, phone screens will disappear.

The third major development will change our understanding of a mobile phone. From a single phone, the mobile will be developed into multi-part devices. It is opposite to the current trend in which mobile phones are combining the functions of cameras, music players and game consoles. The prediction is based on the idea that the world will become more wireless and all these—cameras, music players and game consoles—will be wirelessly connected. Mobile phones won’t need to contain these devices because users will be able to control them wirelessly through their phones.

1.The first paragraph serves as ________.

A. a lead-in          B. a conclusion      C. a summary         D. a supporting fact

2.Which of the following is most likely to be the appearance of a mobile phone in 2020?

A. drive cars for us

B. be controlled by the users’ voices

C. be controlled by home appliances

D. be very big together with separated multiple parts

4.The text mainly tells us ________.

A. three major trends of mobile phones

B. what mobile phones will look like in 2020

C. the future mobile phones are gesture-based

D. some new functions of the present mobile phones

高二英语阅读理解简单题查看答案及解析

Mobile phone users have developed a series of symbols, such as ^_^ and └(^o^)┘， to show________they feel.

A. which                B. why              C. how              D. what

高二英语单项填空简单题查看答案及解析

What mobile phones will look like in a year or two is easy to guess—they will be slimmer and probably will let you watch television________.

A. in the distance　　 B. on the move

C. on the way　　 D. on the mend

高二英语单项填空简单题查看答案及解析

--- Why is the man so upset today?

--- His wallet, mobile phone, and ID card 　 　　 , the police are investigating and will send him to a social assistance station.

A. stolen　　 B. having stolen

C. being stolen　　 D. are stolen

高二英语单项填空中等难度题查看答案及解析

Though they are very busy every day, they manage to get tighter_______.

高二英语单项填空中等难度题查看答案及解析

Though plastic shopping bags are cheap and useful, they cause widespread pollution. Now, we may have an unlikely helper to help clean up our garbage — a small wax worm.

The worm’s hidden skills were discovered by accident. About two years ago, Federica Bertocchini, a developmental biologist at the Spanish National Research Council and an amateur beekeeper, was cleaning out bees’ nest that had been filled with worms. She removed the worms and put them in a plastic bag while doing the cleaning. After finishing, she went back to the room where she had left the worms, and found they had escaped from the bag. When she checked, she saw that the bag was full of holes.

Realizing she may have made an important discovery, Bertocchini teamed up with other researchers to conduct further research. They began by placing 100 worms on some plastic bags and discovered that over a 24-hour period, the worms managed to chew through 92 milligrams of plastic. The researchers make an appropriate judgment that at this rate, the group of worms could　 degrade (降解) an average-sized 5.5-gram plastic bag within a month. To rule out the possibility that chewing was causing the degradation, the researchers spread the soft wet substance inside the body of some recently dead worms on a sheet of plastic. Sure enough, even the liquid was able to eat through the material, confirming that the worms have plastic-digesting enzymes (酶).

While the news is certainly encouraging, not everyone is convinced. The Michigan State University’s Ramani Narayan believes the tiny pieces of microplastics released by the plastic-eating worms would pick up harmful substances and transport them up the food chain, causing, even more, harm to the environment and human health. Susan Selke, director of Michigan State University School of Packaging, is concerned that the worms will not be able to survive in an oxygen-free landfills where large amounts of waste material are buried under the earth.

However, Bertocchini is not planning to transport worm armies to landfills. Instead, the researcher wants to identify the enzyme that helps degrade the plastic. The researcher says, maybe we can find the molecule (分子) and produce it on an industrial level, rather than using a million worms in a plastic bag.

1.What did the experiment of using dead worms find out?

A.Worms’ chewing may cause the degradation.

B.A plastic-eating chemical exists in wax worms.

C.Dead worms are effective in dealing with plastic.

D.It takes a long time for worms to degrade plastic.

2.What is Ramani Naravan's attitude to Bertocchini's finding?

A.Objective B.Convinced C.Questioning. D.Optimistic.

3.What might Bertocchini focus her later research on?

A.The structure of plastic-degrading enzymes.

B.The use of other worms in disposing plastic.

C.Wax worms’ adaptability to the landfill environment.

D.The chance of producing wax worms on a large scale.

4.What is the best title for the text?

A.Can wax worms save the environment?

B.Wax worms have an appetite for plastic.

C.Why do wax worms have plastic-eating skills?

D.Hungry worms join the fight against plastic pollution

高二英语阅读理解中等难度题查看答案及解析

Mobile phones are everywhere in big cities. It seems that 　　 　　 　　 can live without one. Mobile phones are a great　 　　 　　 to stay connected with friends and family.　　　 　　 　 , it is important to remember that there are certain times 　　　 　　 　　　 you should not be using your phone, especially as a student, during school.

you are in class, you should not be sending your friends text messages 　　 　　 　　 taking phone calls. Your classmates and teacher should not have to deal with this rude 　　　 　　 　 . Aren’t you at school to learn?

In the United States, students would never be allowed to 　　 　　 　　 their mobile phones during class. If you were to send or 　　　 　　 　 a text message you would probably be kicked 　　 　　 　　 class. It is very disturbing to hear a lot of tones and ringing during 　　 　　 . There are many more rules for mobile phone use in America and it is to 　　 　　 　　 respect for those around you.

As a teacher in China, I have to 　　 　　 　　 students using mobile phones every day. I have told my class to　　　　 　　 　　 their phones, but many students do not listen. The 　　 　　 　　 to be connected all the time seems to be more 　　 　　 　　 than the desire to learn.

It’s easy to understand　　　 　　 　 it is so tempting(诱惑人的) to have your phone on during class. It seems so easy just to send a short text message; it’s not hurting anyone, is it? But you may actually be hurting 　　 　　 when you do this. Your teacher knows when you use your phone and may give you a 　　 　　 　　 grade. Sending a text message also takes your attention away from what’s going on in class, you may　　 　　 something important.

1.A. one　　　　　　　　 B. somebody　　　　　　 C. someone　　　　　　 D. no one

2.A. way　　　　　　　　　 B. road　　　　　　　　 C. method　　　　　　 D. path

3.A. But　　　　　　　　 B. However　　　　　　 C. So　　　　　　　　 D. Therefore

4.A. which　　　　　　 B. that　　　　　　　 　 C. when　　　　　　　 D. where

5.A. After　　　　　　　　 B. Before　　　　　　 C. Because　　　　　 D. If

6.A. or　　　　　　　　　 B. and　　　　　　　　 C. as well as　　　 D. instead of

7.A. act　　　　　　　　　 B. action　　　　　　 C. habit　　　　　　 　 D. behavior

8.A. have　　　　　　　　 B. take　　　　　　　　 C. use　　　　　　　　 D. send

9.A. receive　　　　　　 B. accept　　　　　　　 C. make　　　　　　　 D. get

10.A. of　　　　　　　　　 B. off　　　　　　　　 C. out　　　　　　　　 D. out of

11.A. school　　　　　　 B. class　　　　　　　　 C. office　　　　　　 D. home

12.A. ask　　　　　　　　 B. suggest　　　　　　 C. show　　　　　　　 D. answer

13.A. do　　　 　　　　　 B. deal　　　　　　　　 C. do with　　　　　　 D. deal with

14.A. turn on　　　　　　 B. turn down　　　　　 C. turn off　　　　 D. turn in

15.A. desire　　　　　　 B. wish　　　　　　　 　 C. hope　　　　　　　　 D. expect

16.A. possible　　　　　 B. important　　　　　 C. necessary　　　　 D. interesting

17.A. why　　　　　　　　 B. what　　　　　　　　 C. that　　　　　　 　　 D. whether

18.A. himself　　　　　　 B. herself　　　　　　 C. ourselves　　　　 D. yourself

19.A. lower　　　　　　　 B. higher　　　　　　 C. better　　　　　　 D. upper

20.A. forget　　　　　　 B. remember　　　　 C. miss　　　　　　 D. leave

高二英语完形填空中等难度题查看答案及解析