在某工程单代号搭接网络计划中,关键线路是指( )的线路。A.相邻两项工作之间的时距

题型:单项选择题

问题:

在某工程单代号搭接网络计划中,关键线路是指( )的线路。

A.相邻两项工作之间的时距之和最大

B.相邻两项工作之间的时间间隔全部为零

C.工作的持续时间总和最大

D.相邻两项工作之间的时距全部为零

考点:监理工程师(建设部)建设工程质量、投资、进度控制建设工程质量、投资、进度控制
题型:单项选择题

如图所示,两木块的质量M是m的二倍,水平面光滑,当用水平力F分别推m和M时,两物体之间弹力之比N1:N2应为:

A.1:1

B.1:2

C.2:1

D.3:1

题型:单项选择题

The following questions present a sentence, part of which or all of which is underlined. Beneath the sentence, you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.

These questions test correctness and effectiveness of expression. In choosing your answer, follow the requirements of standard written English; that is, pay attention to grammar, choice of words, and sentence construction. Choose the answer that produces the most effective sentence; this answer should be clear and exact, without awkwardness, ambiguity, redundancy, or grammatical error.

The state medical review board is considering a new regulation that physicians practicing in state facilities with past malpractice suits having been filed against them are required to disclose any such suits to prospective patients.()

A. that physicians practicing in state facilities with past malpractice suits having been filed against them are required to disclose any such suits to prospective patients

B. that requires physicians practicing in state facilities to disclose any past malpractice suits filed against them to prospective patients

C. to require physicians with past malpractice suits filed against them and who practice in state facilities to disclose these to prospective patients

D. for physicians that practice in state facilities requiring them to have disclosed to prospective patients past malpractice suits filed against them

E. requiring physicians who practice in state facilities to disclose to prospective patients any past malpractice suits filed against them

题型:单项选择题
如图所示为一磁流体发电机示意图,A、B是平行正对的金属板,等离子体(电离的气体,由自由电子和阳离子构成,整体呈电中性)从左侧进入,在t时间内有n个自由电子落在B板上,则关于R中的电流大小及方向判断正确的是(  )

A.I= ,从上向下

B.I= ,从上向下

C.I= ,从下向上

D.I= ,从下向上

题型:单项选择题

切换效果设置的是()的切换效果

A.进入时

B.退出时

C.进入和退出时

D.以上都不对

题型:单项选择题

共轭效应

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