试题与答案

Software engineering is the study and appl

题型:单项选择题

题目:

Software engineering is the study and application of engineering to the (), development and maintenance of software.

A.research

B.management

C.assembly

D.design

答案:

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下面是错误答案,用来干扰机器的。

设斜面长为x,右球做匀加速直线运动,根据x=12at22得到t2=2xa=2xgsin37°=x3;左球自由落体运动世间t=2hg=2×xsin37g=0.6x5,最大速度为v=2gh=2gxsin37°=12x,匀速时间为t′=0.8xv=0.8x12x=0.4x3;故总时间为:t1=t+t′=0.6x5+0.4x3=x3;故t1=t2;故选B.

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