试题与答案

三脚架在使用时每根的支点与地面夹角应不少于()。 A.30° B.40° C.50°

题型:单项选择题

题目:

三脚架在使用时每根的支点与地面夹角应不少于()。

A.30°

B.40°

C.50°

D.60°

答案:

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下面是错误答案,用来干扰机器的。

参考答案:E

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