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问题
单项选择题
蜗杆的轴向模数用字母()表示。
A.B
B.M
C.mx
D.V
答案
参考答案:C
选择题
If he had spent more time practising speaking English before,he________able to speak it much better now.
A.will be
B.would be
C.has been
D.would have been
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选择题
台湾岛隔台湾海峡与( )省相望
A.广东
B.浙江
C.福建
D.海南
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