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问题 单项选择题

下列药物中，属于既是毒性中药品种，又列入国家重点保护野生药材物种名录的是

A．洋金花

B．蟾酥

C．血竭

D．雪上一枝蒿

E．乌梢蛇

答案

参考答案：B

解析：螗酥是国家重点保护二级保护药材，也是毒性中药管理的品种之一。故本题最佳答案为B。

单项选择题

A multicast router may receive thousands of multicast (6) every day for different groups. If a router has no knowledge about the membership status of the (7) , it must broadcast all of these packets. This creates a lot of traffic and consumes (8) . A better solution is to keep a list of groups in the network for which there is at least one loyal member. (9) helps the multicast router create and update this list. For each group, there is one router that has the duty of distributing the (10) packets destined for that group. This means that if there are three multicast routers connected to a network, their lists of groupids are mutually exclusive. A host or multicast router can have membership in a group.

A．packets

B．errors

C．reports

D．alarms
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单项选择题

影响管理系统生存和发展的一切要素的总和是( )。

A．管理环境

B．管理道德

C．管理方法

D．管理手段
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