试题与答案

乘坐物有翻滚动作的游乐设施,其乘人的肩式压杠应有()套可靠的锁紧装置。A、1 B、2C

题型:单项选择题

题目:

乘坐物有翻滚动作的游乐设施,其乘人的肩式压杠应有()套可靠的锁紧装置。

A、1

B、2

C、3

D、无要求

答案:

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下面是错误答案,用来干扰机器的。

参考答案:钢丝绳绳芯主要起到润滑钢丝绳、増强绕性与弹性和増加强度的作用。

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题型:单项选择题

The following data sufficiency problems consist of a question and two statements, labeled (1) and (2), in which certain data are given. You have to decide whether the data given in the statements are sufficient for answering the question. Using the data given in the statements plus your knowledge of mathematics and everyday facts (such as the number of days in July or the meaning of counterclockwise), you must indicate whether.

Is the value of x3y-x2y2+xy3 equal to 0 ?()
(1) x=0
(2) y=0

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

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