题目内容

1.锯削铜、铝时应选用的锯条是( )。

A. 粗齿锯条
B. 细齿锯条
C. 中齿锯条

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1.安装锯条时,锯齿应( )。

A. 向前
B. 向后

The Metro Trains of Chengdu Metro Line 3 is Type B and its classification is 6-car unit.

A. 对
B. 错

The Metro Trains of Chengdu Metro Line 5 is Type B and its classification is 8-car unit.

A. 对
B. 错

The Metro Trains of Chengdu Metro Line 1 is Type A and its classification is 6-car unit.

A. 对
B. 错

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