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【单选题】
如图 所示悬臂梁根部弯矩 M A 的大小为( )
A.
‐ Fa
B.
ql 2 /8
C.
ql 2 /2
D.
‐ 2qa 2
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【单选题】某企业税后净利润为75万元,所得税率25%,利息费用为50万元,则该企业利息保障倍数为()。
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【单选题】Based on the information presented in this selection, a child can best be helped to overcome a fear of riding an escalator by ______.
A.
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B.
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