试题与答案

刺激强度中,捻转的中度刺激量是()。 A.捻转角度小于90°,频率小于60次/分。

题型:单项选择题

题目:

刺激强度中,捻转的中度刺激量是()。

A.捻转角度小于90°,频率小于60次/分。

B.捻转角度大于90°,频率小于60次/分。

C.捻转角度在90°~180°之间,频率在60~90次/分之间。

D.捻转角度在90°~180°之间,频率大于90次/分。

E.捻转角度大于180°,频率大于90次/分。

答案:

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参考答案:D解析: 视图是根据基本表派生出来的,所以把它叫做虚拟表。在视图中,不但可以进行查询,而且在Visual FoxPro中,视图是可以更新的,但是这种更新是否反映在基本表中则取决于视图更新属性的设置。在...

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