问题
判断题
机床夹具有利于提高加工精度和生产率。( )
答案
参考答案：对
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机床夹具有利于提高加工精度和生产率。( )
参考答案：对
Passage One
Which of the following group of people is most likely to be interested in the talk
A．Tourists.
B．Mountaineers.
C．Poachers.
D．Businessmen.