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【简答题】
塑性材料制的圆截面折杆及其受力如图所示,杆的横截面面积为 A ,抗弯截面模量为 W , 则图 (a) 的危险点在 ,对应的强度条件为 ;图 (b) 的危险点在 , 对应 的强度条件为 ;试分别画出两图危险点的应力状态。
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反馈参考答案：
举一反三
【简答题】在时间上和数值上均作离散变化的物理信号称为( ),在时间上和数值上均作连续变化的物理信号称为( )
【单选题】— Has the homework been finished? — Our teacher asked you .
A.
whether had the work been finished
B.
if the work had been finished
C.
the homework has been finished
D.
the work had been finished
【单选题】Half of the work ______ by now. [ ]
A.
has finished
B.
has been finished
C.
have been finished
【简答题】表达式语句由 和 组成。
【单选题】●The project budget has been finalized.Additional work has been discovered that was not planned for in the budget or project scope.(74) could provide the fund to cover the newly discovered work item. ...
A.
Contingency reserve
B.
Project profit
C.
Management reserve
D.
Special fund
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