梁在横向力作用下发生平面弯曲时,横截面上最大剪应力作用点的正应力不一定为零。 答题: 对. 错. (

梁在横向力作用下发生平面弯曲时,横截面上最大剪应力作用点的正应力不一定为零。 答题: 对. 错. (已提交)

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Because of his ill health, she has been obliged to

Because of his ill health, she has been obliged to ___ her job.( )(本题2.0分) A、 di

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How can you keep the machine ____ when you are awa

How can you keep the machine ____ when you are away?( )(本题2.0分) A、 run B、 to run

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