【单选题】How many ethnic groups are in China?
【单选题】--- Can you tell me how many study groups there are in a class? --- Generally speaking, a class often ___ 8 study groups, each with 7 group members.
【单选题】习题1.4 下面关于计算机控制系统中的A/D字长说法正确的是:( )
B.
A/D 的字长对计算机控制系统有一些影响,但不会影响控制性能
C.
如果 A/D 的字长选择不合适有可能会使计算机控制系统产生极限环振荡
D.
如果采样周期满足要求, A/D 字长对系统没有影响
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【单选题】How many groups of people using the scientific method are mentioned in the passage?
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【简答题】win7开启ICF后局域网内机器如何实现互访?
【单选题】How many ethnic groups in China?
【单选题】How many ethnic groups are there in China?