试题与答案

患者,男性,38岁,车祸伤半小时。查体:发绀,烦躁不安,呼吸困难。左胸第5肋间处见直

题型:单项选择题

题目:

患者,男性,38岁,车祸伤半小时。查体:发绀,烦躁不安,呼吸困难。左胸第5肋间处见直径约4cm不规则创口并可闻及气体进出声。此病例的病理生理改变是()

A.纵隔扑动造成循环衰竭

B.急性肺水肿导致气体交换降低

C.纵隔向健侧移位,伤侧肺代偿性膨胀

D.胸膜腔内压力不断升高导致呼吸衰竭

E.吸气时健侧胸膜腔内压力增高,纵隔摆向伤侧

答案:

参考答案:A

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题型:单项选择题

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The (5) of DDT illustrates the problem. DDT, a chemical which kills insects, at first seemed to be a perfect answer (6) many problems. It would control insects that caused dangerous diseases, (7) insects that caused billions of dollars of damage to crops every year. Governments permitted and even (8) the use of DDT. Farmers in many countries (9) to spray it on their crops. The (10) results were good: Damage to crops (11) down, and profits went up. However, the chemical had effects which the scientists didn’t see in (12) . First, it also killed insects which were the (13) enemies of the harmful insects and which were therefore beneficial to farmers. Second, and perhaps worse, DDT did not kill (14) harmful insect. A few insects had natural resistance to the chemical. They (15) and reproduced in large numbers. In a few years there were large numbers of insects which were not (16) by DDT, and there were (17) insects which could act as natural (18) on these new "super-insects". Finally, it became clear that DDT was not solving the insect problem. In fact, it was making the problem worse. It (19) became necessary to find a second (20) for the effects of the first.

10()

A.fast 

B.immediate 

C.moment 

D.last

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