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【单选题】
如图所示长方形截面细长压杆，b/h=1/2，如果将b改为h后仍为细长杆，则临界力 Pcr是原来的( )倍。A.
2
B.
4
C.
8
D.
16
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A.
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B.
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C.
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D.
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【多选题】关于单位犯罪，下列选项错误的有哪些?
A.
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B.
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C.
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D.
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【简答题】Ireland has had a very difficult history. The problems started in the 16 th century when English rulers fried to conquer(征服) Ireland. For hundreds of years, the Irish people fought against the English...
【多选题】下列哪些地名,可能成为注册商标
A.
县级以下的镇、乡地名
B.
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C.
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D.
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A.
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B.
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C.
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D.
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