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【单选题】
若刚体受三个力作用而平衡,且其中有两个力相交,则这三个力组成的______。
A.
必定是平面力系
B.
必定是汇交
C.
必定是平行力系
D.
必定是平面汇交力系
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A.
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B.
烧杯
C.
吸管
D.
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A.
Start Server1 from the Windows Server 2003 installation CD-ROM. Use the Recovery Console to repair the system.
B.
Start Server1 in Safe Mode with Command prompt.
C.
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D.
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A.
designed
B.
designs
C.
designing
D.
is designed
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A.
正确
B.
错误
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A.
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B.
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C.
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D.
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