题目内容

A safety margin can be added to provide the option to stop on the runway in case of a____takeoff.

A. failed
B. unsuccessful
C. headwind
D. rejected

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In most such aircraft, any engine failure results in a rejected takeoff as a matter of course, since even____the end of the runway is preferable to lifting off with insufficient power to maintain flight.

A. passing
B. skidding off
C. overrunning
D. missing

在力的作用下,体内任意两点距离不变的物体称为刚体。

A. 对
B. 错

平衡即是静止,所以静力学只研究物体静止时的力学规律

A. 对
B. 错

力是物体间相互的机械作用,所以没有接触不会产生力的作用。

A. 对
B. 错

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