题目内容

蝶泳转身与到达的手臂触壁要求与蛙泳一样。

A. 正确
B. 错误

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乐果高效低毒的原因是在人体内经酰胺酶分解为无毒的(),而在昆虫体内氧化酶的作用下转变成毒性成倍提高的氧乐果。

用电信息采集系统中心站与终端通信方式采用()

A. 问答式规约
B. 循环式规约
C. 单一式规约

When a tug is pulling on a hawser at right angles to the ship,and the pilot wants to come ahead or astern on the ship’s engine,care must be taken that the pilot().

A. does not break the towline
B. does not get too much way on the vessel
C. keeps a steady course so the towline will remain tight
D. turns the ship toward the direction of pull

如何理解草地的综合培育?

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