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【判断题】
所谓条件性对称不稳定，从物理上看，就是在垂直方向上为对流性稳定和在水平方向上为惯性稳定的环境中，空气作倾斜上升运动时可能出现的一种不稳定。()A.
正确
B.
错误
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【简答题】Henry was an office worker in a big city. He worked very hard and enjoyed traveling in his holidays. He usually went to the seaside, but one year he saw an advertisement in a newspaper. “Enjoy country...
【简答题】阅读理解。 Alan worked in an office in the city. He worked very hard and really looked forward to his holiday. He usually went to the seaside, but one year he saw an ad. in a newspaper 'Enjoy country life....
【单选题】He worked very hard. _____ he got good grades in the final examination last year. [ ]
A.
In this way
B.
On the way
C.
By the way
D.
All the way
【简答题】（C） A Different Roast Every Day Alan worked in an office in the city. He worked very hard and really wanted to take a holiday. He usually went to the seaside, but one day he saw an ad（广告） in a newspap...
【单选题】He worked very hard, otherwise he the entrance exam.
A.
didn't pass
B.
couldn't pass
C.
hadn't passed
D.
couldn't have passed
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