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问题 单项选择题

老年人用庆大霉素时应谨慎，主要是因为老年人

A．肾功能降低，药物半衰期延长，耳、肾毒性增加
B．血浆蛋白含量降低，使游离性药物增加
C．对药物处于高敏状态，影响中枢神经系统的功能
D．肝功能降低，使血药浓度升高
E．消化腺分泌减少，药物吸收增加

答案

参考答案：A

单项选择题

在 * * 内应易溶化溶散或融化、崩解并释放药物，主要起局部消炎杀菌作用（）.

A．可溶片 

B．泡腾片 

C．缓释片 

D．控释片 

E． * * 片
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单项选择题

As the pace of life continues to increase, we are fast losing the art of relaxation. (1) you are in the habit of rushing through life, being on the go from morning till night, it is hard to (2) down. But relaxation is (3) for a healthy mind and body.Stress is a (4) part of everyday life and there is no way to (5) it. In fact,it is not the bad thing that it is often supposed to be. A (6) amount of stress is important to provide motivation and give (7) to life. It is only when the stress gets out of control (8) it can lead to poor performance and (9) health.The amount of stress a person can bear(10) very much on the individual. Some people are not afraid of stress, and such (11) are obviously chief material for managerial responsibilities. Others lose heart at first (12) of unusual difficulties. When exposed to stress, in (13) form, we react both chemically and physically. In fact we (14) a choice between escape and fight. But in more ancient days they made the (15) between life and death. The crises (危机)we meet today are (16) to be so extreme,but however little the stress,it requires the same response. It is when such a reaction (17) long，through continued exposure to stress，that health becomes (18) ．Such serious conditions as high blood pressure and heart diseases have (19) links with stress． (20) we canno! remove stress from our lives we need to find ways to deal with it．It would be unwise to do so even it we could．So what do you think of stressWhat is your way to deal with it.

第（3）空应选择（）

A．unnecessary

B．satisfied

C．useful

D．necessary
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