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问题 多项选择题

肝脏首过效应较大的药物，可选用的剂型是（）

A.口服乳剂

B.肠溶片剂

C.透皮给药制剂

D.气雾剂

E.舌下片剂

答案

参考答案：C, D, E

解析：本题考查影响药物代谢的因素。肠溶片剂、口服乳剂这两种剂型经胃肠道吸收，存在肝脏首过效应，如果某药的肝脏首过效应较大，则不适宜制成这两种剂型；而透皮给药系统是经过皮肤黏膜吸收，气雾剂在肺部吸收，舌下片剂通过舌下黏膜吸收，不存在肝脏首过效应，故本题答案应选CDE。

填空题



Americans have four primary avenues for making friends: at work, at school, through a hobby or a (1) such as volunteer work and discussion group, or through a family or (2) .
In American culture, a job is more than the work that one performs between the hours of 9 a.m. and (3) . Work becomes a major socializing influence. Many young mothers who (4) their jobs to care for small children remark on the loneliness of their new lifestyles because they have lost their forum for (5) .
A great number of American employers recognize business social (6) and use it to build a family atmosphere on the job so that employees will feel (7) in their work environment. Some employers arrange company get-togethers in their home or at a (8) . American companies have at least one (9) annually, usually at Christmas time. Many corporations have (10) where employees and administrators alike dress (11) to play games such as baseball and volleyball.
Top American administrators often hold social gatherings (12) . Depending upon the size of the employer’s home and the number of (13) . These social gatherings may be picnics, pool parties, or (14) . If the company is large, an employer may hold what Americans call (15) . For an open house, the employer will invite his employees to come to his home (16) between 1 p.m. on a certain day. Those invited usually stay for (17) , chatting with the other guests and their host. People come and go (18) during the designated hours, and the host keeps refreshments, usually (19) or hors d’oeuvres and beverages, available for all who come. For such social gatherings, it is considered (20) the invitation unless you have an excellent reason.
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单项选择题

关于数据交换，下列叙述不正确的是______。

A．线路交换面向连接
B．分组交换比报文交换具有更好的网络响应速度
C．报文交换无存储转发过程
D．分组交换有存储转发过程
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