题目内容

What is the dialogue mostly about?

A. how to generate revenue
B. the importance of proper cash levels
C. how to keep from being bought out
D. how to avoid a zero cash balance

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The woman thinks they should

A. buy out a competitor.
B. invest to generate revenue.
C. operate with a zero cash balance.
D. prepare for unexpected expenses.

平面一般力系的三力矩式平衡方程的附加使用条件是( )。

A. 二个矩心连线与投影轴垂直
B. 二个矩心连线与投影轴不垂直
C. 投影轴通边一个矩心
D. 三个矩心不共线

平面一般力系的平衡方程数为( C )。

A. 1个
B. 2个
C. 3个
D. 4个

二力杆约束的特点?

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