对PCR扩增产物进行测序分析的HLA基因分型法是（） A.PCR-RFLP B.PC

阅读短文，选择正确答案。

    Although cliff diving may bring great excitement, it's a very dangerous sport that people should be careful

about. It is completely wrong to think that the diver is cushioned (缓冲) by the water below-this could not be

further from the truth. When jumping from a cliff that is over 70 feet high, a diver hits the water at over 46 mph

(miles per hour). Such high speeds make the point of contact feel like a wall, so the diving skills are very

important. 　　

    Professional divers are trained and well-prepared to make dives. However, non-professionals should never

dive because a diver's body position (体位) at the time of contacting water is very important to his or her safety.

Because of the great danger, divers should always seriously think about their skills before trying any moves. 　　

    Although there is no truly safe way to jump off a cliff, non-professional divers are encouraged to pencil dive.

To do a pencil dive, the jumpers leap their feet first off the cliff, keep arms at their sides with legs together and

pointing downward. The diver should keep the body tight and vertical (垂直的). This is safer because it makes

the point of contact smaller when the diver enters the water and puts less stress (压力) on the body. 　　

    Wearing a wet suit while diving will result in less pain. So it is wise for new divers to wear wet suits. But

professional divers suggest staying away from water shoes. Although wearing shoes might seem like a good

idea, they actually increase the force of impact(冲击力) because they increase the surface area of the diver at

impact. The increased force of impact puts stress on a diver's body and can lead to broken bones. Without a

doubt, diving without shoes is the safer way to go. 　　

    Besides the height, speed, water depth and body position, it is also important for divers to make wise

decisions when they are thinking about diving. Cliff diving tests both a person's physical and mental(心理的)

skills, so it is never a good idea to jump with a sudden idea. A person needs to be of sound mind and in good

health to even think about a dive. One should never try a dive if he has drunk wine. What's more, a person

should never make someone who is not feeling 100% confident dive.

1. What does "this could not be further from the truth" mean? [ ]

A. There's no doubt that this idea is definitely true. 　　

B. This idea is thought to be completely wrong. 　　

C. It depends on the real situation on the spot. 　　

D. Nobody knows whether this idea is true or not.

2. Why didn't professional divers suggest wearing shoes? Because wearing shoes can             . [ ]

A. put more weight on to the diver 　　

B. cause the diver to feel uncomfortable 　　

C. make the point of contact bigger 　　

D. certainly lead to broken bones

3. According to the passage, a good cliff diver should be _______. [ ]

A. well-prepared and skillful　　　　

B. professional and strong 　　

C. creative and smarty 　　　　　　　

D. confident and brave

抛物线y=x²-1的顶点坐标是（　　）

A．（0，1）

B．（0，-1）

C．（1，0）

D．（-1，0）

_____ the woman over there? And _____ is this new bag?         [ ]

A. Who's; whose

B. Whose; Who

C. Whose; whose

D. Who's; who's

阅读理解。

     In life, people come across many experiences, which they remember throughout their lives. I had a similar

experience, too.

      I was very excited. It was the day of my last paper of the final examination. My mind was full of thoughts

of how I would spend my vacation. I was especially excited of the invitation that my uncle had given me to stay with him for a few days in Cambridge.

     I was prepared for the subject, physics. My friends and I were on the ground doing the last minute revisions and also discussing the questions that were supposed to come in the paper. Suddenly the bell rang and we got

into our classrooms. The teacher came and quickly handed out the answer paper and the question paper. The

paper was of two hours and some of the expected questions came. I finished it almost forty-five minutes earlier. But since it was a rule not to collect the answer paper before the allotted (规定的) time. the teacher was not

collecting and I had to sit till the time was over. I checked my paper twice and corrected some of the mistakes

in it. I started thinking about the place my friends and I had planned to go after the paper.

     Though I was thinking for a long time, the time seemed to be endless. So I thought of drawing something

on the question paper and turned it overleaf. I was shocked to see that the page which I had supposed to be

blank had four more questions on it which carried 20 marks and would take at least half an hour to complete.

I had a quick glance at my watch. There were only 10 minutes left. I was so nervous that I was hardly in a

state to write anything. They were the sub-questions (小题) of the last question. Suddenly our physics teacher

came in and told all of us that in the last question, out of 6 sub-questions only 2 had to be solved. I felt very

much relieved.

      Thereafter I never made such mistakes again. But I realized that my anxiousness and excitement could

have cost me to lose 20 marks and decided never to make such a mistake again.

1. Which of the following statements is true?

A. The writer didn't work hard at physics.

B. The writer lost 20 marks for the last question.

C. The writer made some mistakes during the exam.

D. The questions on the paper were difficult for the writer.

2. The underlined word "relieved" means ________.

A. more nervous

B. less afraid

C. more surprised

D. less worried

3. We can infer from the passage that _______.

A. the writer did 2 sub-questions of the last question

B. the writer turned overleaf to do the sub-questions

C. the writer spent 45 minutes finishing the paper

D. the writer got full marks in the physics exam

4. We can learn from the passage that we should _______.

A. learn some exam skills

B. concentrate on what we are doing

C. try our best to do well in the exam

D. be careful not to make mistakes in the exam

¹³¹I治疗甲亢前，患者心率快，情绪紧张，如对症处理，应给予（）

A.抗生素

B.镇静剂

C.抗甲状腺药物

D.β受体阻滞剂

E.碘剂