题目内容

1.安装锯条时,锯齿应( )。

A. 向前
B. 向后

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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

The Metro Trains of Chengdu Metro Line 2 is Type A and its classification is 8-car unit.

A. 对
B. 错

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