The field research will take Joan and Paul ab...

The field research will take Joan and Paul about five months; it will be a long time _____ we　　　　　 meet them again.

A. after　　　　 B. before

C. since　　　　 D. when

高三英语单项填空中等难度题查看答案及解析

The field research will take Joan and Paul about five months;it will be a long time_____we meet them again.

高三英语单项填空中等难度题查看答案及解析

The field research will take Joan and Paul about five months;it will be a long time_____we meet them again.

A.after                                 B.before

C.since                                 D.when

高三英语单项填空中等难度题查看答案及解析

The field research will take Joan and Paul about five months; it will be a long time ________ we meet them again.

A. after           B. before               C. since                D. when

高三英语单项填空中等难度题查看答案及解析

The field research will take Joan and Paul about five months; it will be a long time _________ we meet them again.

A. after             B. before             C. since                D. when

高三英语单项填空中等难度题查看答案及解析

Helen devoted herself _______ to her research and became a top scientist in the field of applied physics.

A. seriously          B. extremely           C. entirely      D. strictly

高三英语单项填空中等难度题查看答案及解析

Helen devoted herself ________to her research and became a top scientist in the field of applied physics．

A．seriously        B．extremely           C．entirely           D．strictly

高三英语单项填空简单题查看答案及解析

The researchers say a person loses two months for every kilogram overweight they are— and seven years for smoking a packet of cigarettes a day.

Unusually, the Edinburgh university team found their answers by analysing differences in people’s genetic code or DNA. Finally they think it will show new ways of helping us to live longer.

The group used the genetic code of more than 600, 000 people who are taking part in a natural experiment. If someone smokes, drinks, drops out of school and is overweight, it can be difficult to identify the impact of one specific unhealthy behavior.

Instead, the researchers turned to the natural experiment. Some people carry mutations(变异) in their DNA that increase(食欲) or make them more likely to put on weight, so researchers were able to compare those programmed to eat more with those who were not. The research team also found specific mutations in human DNA that alter lifespan (寿命).

●Mutations in a gene (a set of instructions in DNA) that is involved in running the immune system could add seven months of life on average.

●People with a mutation that increased levels of bad cholesterol knocked eight months off lifespan.

●A rare mutation in a gene—APOE—linked to dementia reduced lifespan by 11 months.

●And one that made smoking more appealing cut lives by five months.

Dr Joshi says that while genes do influence lifespan, “you’ve got even more influence” through the choices you make. Dr Joshi said, “We hope to discover genes affecting lifespan to give us new information about ageing and construct treatment tor ageing.”

There are also some disease mutations that clearly affect lifespan and to destructive effect, such as the Huntington’s gene. People with Huntington’s often die in their 20s.

However, in order to follow people until the end of their lives, many of the people studied were born before 1940.

1.What is the most difficult for the researchers to find?

A. The differences in people’s genetic code.

B. The reasons why people put on weight very easily.

C. The results of many natural and massive experiments.

D. One bad behaviour’s effect on people with many bad behaviours.

2.Which of the following mutations affects lifespan most greatly?

A. One linked to controlling immune system.

B. One increasing unhealthy cholesterol.

C. One called APOE involved in dementia.

D. One making smoking more attractive.

3.What’s the meaning of Dr Joshi’s study?

A. To help stop mutations.　　 B. TO find diseases earlier.

C. TO make people live longer.　　 D. TO reduce the effects of genes.

4.Why did researchers mainly study people born before 1940?

A. To follow them until they die.　　 B. TO educate them an extra year.

C. To show they are more important.　　 D. To make them live happier.

高三英语阅读理解中等难度题查看答案及解析

This type of bamboo grows very fast and it will take only three to five years _____ it can be used in various fields .

高三英语单项填空中等难度题查看答案及解析

My track and field coach, Mr Jones, had decided to get the team to take part in the 4x100m race. It would be the first time that we were running in such a race. We needed to work as a team to improve on our speed. The most critical moment was the passing of the baton (接力棒) at the right time to the next runner.

Mr Jones had chosen me to start the race. The next runner would be Susan. In the beginning, whenever we practised passing the baton, something would go terribly wrong. I would either be going too slowly or she would be taking off too late. We needed to perfect it. At the same time, I had to make sure that I would not go beyond the yellow line.

Finally it was the day of the race. We were confident that the gold medal would be ours. Each of us had improved in our running speed. Our passing of the baton had been perfected during the practices.

My reactions were exact and accurate as I started running. Everything felt the way it should as I sprinted towards Susan. I held the baton in my sweaty palms, promising myself not to let go. My long legs moved me as fast as I could go round the comer. As I came closer to my final steps, my heart was beating faster than usual. The cheering by the spectators (观众) got into me and I became nervous. “What if we lose?” I thought to myself. It was then that I saw Susan in the far distance.

I held out the baton and continued running quickly towards Susan. Susan yelled “Slow down, slow down!” However, it was too late. The official held up the red flag. It was then that I realized that I had gone beyond the yellow line.

1.What does the underlined “it” in the second paragraph refer to?

A. Going too slowly.　　 B. Taking off too late.

C. Passing the baton.　　 D. Going beyond the yellow line.

2.Why was author confident of winning the race?

A. They worked as a team and were supported by the spectators.

B. They had perfected the running speed and the passing of the baton.

C. They had learned how to avoid breaking the rules in the race.

D. They gained an advantage of a stable state of mind in the race.

3.What can we infer about the author?

A. He ran too fast throughout the race.　　 B. He lost his focus in the race.

C. His start skill needed improving.　　 D. He was not well-trained in running.

4.How would the author feel after the race?

A. Proud.　　 B. Grateful.

C. Puzzled.　　 D. Disappointed.

高三英语阅读理解中等难度题查看答案及解析