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【判断题】
水力最优断面是指渠道过水断面面积、粗糙系数一定时,通过最大流量的断面形状。
A.
正确
B.
错误
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B.
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【单选题】Paul shrugs his shoulders when he is talking about himself.
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【单选题】Paul knows punctuality is one of his biggest ______.
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—Paul knows he needs to stop being late.
B.
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【简答题】There was once a young man called Paul in a village in the USA. Paul was very lazy because his father was a rich farmer and he didn’t have to work. Mr Smith, a neighbour of his, was a blacksmith (铁匠)....
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