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问题 选择题

听觉形成的正常途径是

A．声波→鼓膜→三块听小骨→耳蜗内的听觉感受器→听神经→听觉中枢

B．声波→鼓室→耳蜗内的听觉感受器→听神经→听觉中枢

C．声波→鼓膜→三块听小骨→听觉中枢

D．声波→鼓室→三块听小骨→听神经→听觉中枢

答案

答案：A

题目分析：听觉的形成过程是：外界的声波经过外耳道传到鼓膜，引起鼓膜的振动；振动通过听小骨传到内耳，刺激耳蜗内的听觉感受器，产生神经冲动；神经冲动通过与听觉有关的神经传递到大脑皮层的听觉中枢，就形成了听觉．

完形填空

第二节语法填空 (共10小题；每小题1分，满分10分)

One day, Henry Adam, an American businessman, sailed out of the bay.    11   (luck) he was carried out to sea by a strong wind. Just when hope was about gone, he was picked up by a ship for London. In the ship he earned his passage by   12  (work) without pay, as a common sailor. When he got to London he was almost   13  .(penny)

On the following morning Henry was wandering on the pavement, when a window behind him was raised, and a gentleman asked him to step in. He   14  (show) into a room where a couple of elderly gentlemen were sitting. A couple of days   15   these two old and wealthy brothers had been having a hot argument what might happen to a stranger in London without a friend, and with no money   16   a million-pound bank-note. One said he   17  (starve) to death; the other said he wouldn't. So they agreed to decide it by a bet. They wrote a   18   with the million-pound bank-note in it. Then the two brothers sat at the window a whole day watching for the right man to give it to until Henry came along.

After they had his story, one of   19   handed Henry an envelope, and said he would find the explanation inside. After promising   20   to open it until 2 o’clock, Henry took his leave.
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单项选择题

疼痛治疗主要利用糖皮质激素的哪项药理作用（）

A.抗毒素作用

B.抗休克作用

C.对代谢的影响作用

D.对中枢神经系统的兴奋作用

E.抗炎和免疫抑制作用
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