Carrying a light load on your bicycle makes i...

Carrying 　 　　 a light load on your bicycle makes it more difficult to control.

A. more than　　 B. not more than

C. less than　　 D. no more than

高二英语单项填空中等难度题查看答案及解析

There is nothing wrong with using a credit card for purchases. It’s more _______ than carrying loads of cash.

高二英语单项填空中等难度题查看答案及解析

Your suggestion on how to improve English writing ability is too general. Could you make it more _______?

A. particular       B. specific        C. special       D. relaxing

高二英语单项填空中等难度题查看答案及解析

Your suggestion on how to improve English writing ability is too general. Could you make it more _______?

A．special           B．particular          C．specific           D．positive

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

— More than glad to see your return from the trip. How did you like it?

— It proved 　　 to make it though I felt a little tired.

A. worthwhile　　　　 B. worth

C. worthy　　　　　　 D. worthless

高二英语单项填空中等难度题查看答案及解析

I will appreciate it ______ you can change your plan a little bit to make it more workable.

A. so　　　　　 B. if　　　　 C. since　　　　　　　 D. although

高二英语单项填空中等难度题查看答案及解析

Artificial intelligence keeps defeating human, it is making countless victories against human in different fields of life and trying to push human to the corner.

Google’s DeepMind has defeated the world’s number one player Ke Jie. Human brain somehow has been replaced by a machine and scientists are working very hard on developing a human brain by implanting a chip and connecting it to the thick neuron that connects the two hemispheres of the brain. Well, who doesn’t want to get his brain upgraded to be as smart as the brain of Albert Einstein or Charles Darwin?

Humans will probably one day invent a brain that can be implanted in the human skull and reprogram all the human thoughts, but this invention doesn’t seems to be happening in the foreseeable future since human brain took millions of years to evolve. Some scientists believe that human will defeat death in the next twenty hundred years but they can’t really predict how long it’s going to take to develop a human brain that can completely replace the natural brain.

Despite of this accomplishment in the field of artificial intelligence, it couldn’t crease people from believing that science can’t stand alone. For instance, AI can imitate human brain and most of the time outperforms it, but there are still a lot of hidden secrets. AI outsmarted Ke Jie has consciousness unlike the AI, Ke Jie felt sad when he was defeated and buried his face in his hands but the AI didn’t feel happy and celebrate his victory.

The computer of 1960 is the same as the computer of 2017 in terms of consciousness, there is no signs so far telling us that there is an algorithm(运算)that can make a conscious computer and decipher (译解) its feelings. We can predict what the future will look like according to the past, especially from scientific point of view but the development of human brain seems unpredictable and unknown.

1.What is the possible meaning of the underlined word “neuron” in Para. 2?

A. The tube through which blood flows in your brain.

B. The kind of cell that carries information.

C. The soft fatty substance in the hollow center of bones.

D. The bony part of one’s head which encloses his/her brain.

2.What is Paragraph 3 mainly about?

A. It took millions of years for human brain to evolve.

B. Humans wish to get their brains upgraded to be as smart as possible.

C. Humans will probably invent a brain that can reprogram all the human thoughts.

D. It is hard to develop a human brain that can completely replace the natural brain.

3.“Ke Jie felt sad when he was defeated” is mentioned in Para. 4 to ________.

A. show that the AI has no human emotions

B. explain that AlphaGo is virtually unbeatable in the board game

C. tell us the accomplishment in the field of artificial intelligence

D. analyze Ke Jie’s psychological characteristics when playing the game

4.What can be the best title for the passage?

A. World Top Go Player Ke Jie Challenges AlphaGo

B. AlphaGo Teaches To use AI To benefit Humans

C. Google AI Defeats Human Go Champion

D. AI Can Imitate Human Brain And Most Of the Time Outperforms It

高二英语阅读理解中等难度题查看答案及解析

It ___ to chat online all day long. You’d better do something else.

A. makes no sense　　　　　　　　　　　 B. makes no difference

C. makes sense　　　　　　　　　　　　　 D. makes difference

高二英语单项填空中等难度题查看答案及解析

Her answer was so confused that the teacher could hardly make any ______ of it.

高二英语单项填空简单题查看答案及解析