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问题 单项选择题

使用微量注射泵给病人注射硝酸甘油，硝酸甘油的输入量为10μg／min，5mg硝酸甘油加入液体至50ml，那么输入药液量应为多少ml／h（）。

A.3.0

B.4.0

C.5.0

D.6.0

E.7.0

答案

参考答案：D

单项选择题

The ARPANET (66) ( the rules of syntax that enable computers to communicate on a network) were originally designed for openness and flexibility, not for (67) The ARPA researchers needed to share information easily, so everyone needed to be an unrestricted "insider" on the network. Although the approach was appropriate at the time, it is not one that lends itself to today’s commercial and government use.
As more locations with computers (known as (68) in Internet parlance)joined the ARPANET, the usefulness of the network grew. The ARPANET consisted primarily of university and government computers, and the applications supported on this network were simple: electronic mail ( E - mail), electronic news groups, and (69) connection to other computers. By 1971, the Internet linked about two dozen research and government sites, and researchers had begun to use it to exchange (70) not directly related to the ARPANET itself. The network was becoming an important tool for collaborative research.

A．protocols

B．statute

C．law

D．enactment
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不定项选择

关于车拉马、马拉车的问题，下列说法中正确的是 [ ]

A．马拉车车不动，是因为马拉车的力小于车拉马的力

B．马拉车车前进，是因为马拉车的力大于车拉马的力

C．马拉车，不论车动还是车不动，马拉车的力的大小总是等于车拉马的力的大小

D．马拉车车不动或车匀速前进时，马拉车的力与车拉马的力大小才相等

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