汽笛脚踏开关在车组无电有风的情况下无法使用。
参考答案：错
So much of interest ___ that most visitors simply run out of time before seeing it all.
A．offers Beijing
B．Beijing offers
C．does Beijing offer
D．Beijing does offer
影响往复式压缩机生产能力提高的因素主要有哪几个方面？
