1.John immediately felt __________(refresh) a...

1.John immediately felt __________(refresh) after a cold shower.

2.Having a large vocabulary is of great __________(important) for middle school students.

3.Pencils need to __________(sharp) before being used.

4.The __________(vary) weather in London often makes the tourists awkward.

5.__________(drag) a big bag of waste iron, he headed to the waste recycling station.

高二英语完成句子中等难度题查看答案及解析

Sleeping in on Saturday after a few weeks of too little shuteye may feel refreshing, but it can give a false sense of security.

New research shows long-term sleep loss cannot be cured that easily. Scientists researched the effects of short- and long-term sleep loss and found that those who suffer long-term sleep loss may function normally soon after waking up, but experience steadily slower reaction times as the day goes by, even if they had tried to catch up the previous night.

The research has important safety significances in an increasingly busy society, not just for shift-workers but for the roughly one in six Americans who regularly get six hours or less of sleep a night.

“We know that staying awake 24 hours without sleep will affect your performance to do all sorts of things, and this effect equals to drinking too much when driving,” said lead researcher Dr. Daniel Cohen of Boston’s Brigham and Women’s Hospital. But when those who suffer long-term sleep loss become all-nighters, “the harm is increased ten times,” Cohen said.

The National Institutes of Health says adults need seven hours to nine hours of sleep for good health. Regularly getting too little sleep increases the risk of health problems, including memory impairment and a weakened immune system. More immediately, too little sleep affects reaction times; sleepiness is to blame for car crashes and other accidents.

It has critically important complicated and unexpected results for anyone who works “crazy hours” and thinks they are performing fine with a few hours of weeknight sleep, said Harris, director at New York’s Montefiore Medical Center. “Don’t think you can just bank up your sleep on the weekend, because it doesn’t work that way,” he warned.

1.People with long-term sleep loss ______.

A. are quicker in thinking                   B. may feel refreshed soon after waking up

C. are surely energetic                         D. can have a strong sense of security

2.Which of the following is the immediate effect of long-term sleep loss?

A. Health problems                             B. Immune system

C. Reaction times                               D. Memory impairment

3.The underlined phrase “bank up” in the last paragraph most probably means ____.

A. pile up               B. pick up              C. add up                     D. build up

4.The text mainly advises people ______.

A. to sleep more time                          B. to sleep in on Saturday

C. to sleep scientifically                      D. to sleep little on weekend

高二英语阅读理解中等难度题查看答案及解析

Boss ___ us taking some days off to get refreshed after so many days of hard work.

高二英语单项填空简单题查看答案及解析

We first met on a train in 2000．We both felt immediately that we _____ each other for years.

A．knew B．have known     C．had known       D．know

高二英语单项填空简单题查看答案及解析

Dalian is well-known for its mild climate, but it________be very cold in winter.

高二英语单项填空简单题查看答案及解析

Senior three student will face the question after they pass by the college entrance examination. Should I choose a good major and a good university? Some students prefer to consider majors first so that they can learn what they are interested. It will also make it possibly for them to take their favorite jobs in the future. However, those who think differently believes that the environment is important to one’s development. They also believe that students graduate from leading universities are often more likely to find a good job. In my opinion, the best choice is to choose a good major at a good university. But if we can obtain both, the first thing to consider is a good major, because no matter where we study, they can still achieve a lot in the certain field if we try our best.

高二英语短文改错中等难度题查看答案及解析

—She looks very happy. She ____have passed the exam.

—I guess so. It’s not difficult after all.

A. should　　 B. could C. might　　　　 D. must

高二英语单项填空中等难度题查看答案及解析

That the US stock market dropped sharply immediately after the US government put forward the proposal on Tuesday to tighten the control on exports of various artificial intelligence technologies indicates what the market thinks of the move.

Multi-national corporations have led the way in the profound compressing(压缩) of time and space that has flattened and changed the world over the last couple of decades, and the overwhelming majority of international technological transfers have been conducted among multi-national companies in pursuit of profits.

Thus the proposal the US government put forward on Tuesday to tighten the control to “avoid negatively impacting US leadership in the science, technology, engineering and manufacturing sector” is being viewed not only as a brake on the US economy but also as a barrier to maintaining that leadership since it will reduce cooperation with the rest of the world and shrink the market for US companies preventing them from investing research and development.

The bigger its market, the more profits a technology company can earn, and the more money it then has to invest in developing even more advanced technologies. This is as true for US companies as it is for others.

Behind the proposal is the narrow-mindedness of policymakers in the US administration, who choose to ignore the fact that the United States would not have become the world leader in science and technology if it had kept its doors closed.

If such controls are intended to contain China’s development, they will certainly fail.

It is true that China has a lot to do to catch up with the US and other developed countries. Yet it has made great steps forward by opening its doors and cooperating with other economies.

As it opens its door wider, it will have even more opportunities to cooperate with other countries in science and technology.

The de-materialization of economic activities — with economic output and income generation increasingly reliant on information rather than inputs of raw materials — only increases the need for cooperative agreements and a cross-disciplinary approach to increase the capabilities of AI and advance its application.

By trying to enforce and exploit an invented-here ideal that is untenable, the US will undoubtedly lose the leadership in science and technology gradually to which it has become accustomed, and prevent the progress of both humans and machines.

1.What does the market think of the proposal put forward by the US on Tuesday?

A.It will tighten the control on exports of various AI technologies.

B.It will become drawbacks which prevent the US from developing fast.

C.If the US had kept its door closed, it would have become the superpower.

D.If the market becomes bigger, a technology company can earn more profits.

2.What influence will the proposal have on China’s development?

A.It will increase the capabilities of AI in China.

B.It won’t stop China’s development though it aims to.

C.It won’t let China become the world leader in science.

D.It will make China lose many opportunities after it takes effect.

3.What conclusion can we draw from the passage?

A.Most of International technological transfers will be conducted so as to seek profits.

B.The US has become accustomed to its leadership in technology and will maintain it.

C.The US will suffer from its control of a variety of artificial intelligence technologies.

D.China has made too big steps in science & technology to cooperate with other countries.

高二英语阅读理解中等难度题查看答案及解析

The chemistry teacher demanded that the laboratory report _________ immediately after the experiment was done.

高二英语单项填空中等难度题查看答案及解析

The chemistry teacher demanded that the laboratory report _________ immediately after the experiment was done.

A．to be written                           B．would be written

C．be written                             D．must be written

高二英语单项填空中等难度题查看答案及解析