CA6140普通车床的传动系统主要由、、螺纹车削传动链。
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在车床上安装工件所用的附件有、、、花盘、心轴、中心架和跟刀架。
Choose the best answers.1. He asked me _____ told me about the accident.
A. whom
B. which
C. who
D. whose
It depends on _____ you look at it.
A. where
B. which
C. why
D. how
Miss Liu said ______ she would leave the book on her desk.
A. that
B. which
C. if
D. what
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