乘用车中价格最贵的一个零件总是()
A.发动机
B.底盘
C.车身
D.电气设备
参考答案:C
we are delighted to establish business relationship with you.
A.be established
B.establishing
C.be establishing
D.have established
给水管与排水管平行埋设时,管外壁的最小允许距离为()m。
A.0.15
B.0.3
C.0.5
D.1.5