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【简答题】
Listen to some extracts from the dialogue and complete the following sentences with the missing words. 1. Interviewer: What was the main purpose of your doing sub-aqua diving was it for catching fish or the adventure involved? Mr. McKenzie: Well, as I said, I got 1 by this cousin who said they wanted someone to help them at the fishing. 2. Mr. McKenzie: ... because of the number of people who are now scuba diving, you’ll find that the price of equipment has decreased in the last ten years to make it really quite 2 .
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【简答题】已知流场的流函数ψ=ax 2 -ay 2 ，试证明：
【简答题】试证平行流场中，沿任意封闭周线的速度环量均为零，即平行均匀流场是一个无旋场。
【简答题】试证明在平行直线匀速流场中，沿任意封闭周线的速度环量为零，即该均匀流场是一个无旋流场。
【简答题】试证明用 所表示的流场和用φ 2 =xy+3x+2y所表示流场是等同的。
【简答题】Welcome to this short tour of London. In this square we are standing in the middle of London. Opposite 对面) is the National Gallery, a museum with lots of famous paintings. Go along the red street to B...
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