通过改善肌内协调来发展散打最大力量练习,通常每组练习的重复次数为()次,完成一组练习

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问题:

通过改善肌内协调来发展散打最大力量练习,通常每组练习的重复次数为()次,完成一组练习的时间约需()秒;其重复的练习组数为()组。

考点:体育科学散打散打题库
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A、B两个小球带同种电荷,放在光滑的绝缘水平面上,A的质量为m,B的质量为2m,它们相距为d,同时由静止释放,在它们距离到2d时,A的加速度为a,速度为v,则(  )

A.此时B的加速度为

a
4

B.此过程中电势能减小

5mv2
8

C.此过程中电势能减小

mv2
4

D.此时B的速度为

v
2

题型:填空题

纳税人被工商行政管理机关吊销营业执照的,应当自营业执照被吊销之日起()内,向原税务登记机关申请办理注销税务登记。

A.7日

B.10日

C.15日

D.30日

题型:填空题

C20表示fcu=20N/mm。

题型:填空题

No one knows how man learned to make words. Perhaps he began by making sounds like those made by animals. Perhraps he grunted like a pig when he lifted something heavy. Perhaps he made sounds like those he heard all around him water splashing, bees humming, a stone falling to the ground. Somehow he learned to make words. As the centuries went by, he made more and more new words. This is what we mean by language.
People living in different countries made different kinds of words. Today there are about fifteen hundred different languages in the world. Each contains many thousands of words. A very large English dictionary for example, contains four or five hundred thousand words. But we do not need all these. Before you leave school, you will learn only a few thousand of them.

In order to make a speech, we need sounds and words.

A. Right.

B. Wrong.

C. Doesn’t say.

题型:填空题

下放钻具超过()时必须使用辅助刹车(电磁涡流刹车)。电磁刹车在使用前,必须保护冷却系统正常。

A.300m或悬重300kN

B.300m或悬重200kN

C.700m或悬重300kN

D.700m或悬重200kN

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