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【单选题】
某有压管道的直径是4m，该管道的水力半径为（ ）。A.
1m
B.
0.5m
C.
2m
D.
3m
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举一反三
【单选题】Why do the Americans show less enthusiasm for general ideas man the French?
A.
The French constitution did not allow for experiment
B.
In America, the constitution provides checks and balances.
C.
The social conditions in France led to different ideas.
D.
The Americans have always been in charge of their own public affairs.
【单选题】Believe it or not, there are a number of words in the English language which were French in __________.
A.
demand
B.
principle
C.
theory
D.
origin
【简答题】论述管理员工的闲暇对于企业社会工作的意义。
【简答题】若直线 和直线 的交点坐标为( ),则 ____________.
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