车间安全通道要求，通行汽车通道宽度大于（）m。
A.2
B.4
C.3
D.5
参考答案：C
The teacher is not easy-going,and he never ____in the pupils’ games.
A．took part
B．joined
C．participates
D．succeeds
零件图上的技术要求一般应包括哪些内容？
