乙二醇蒸汽喷射泵加热使用的汽相热媒系统故障，会使真空喷射泵性能下降。（）
参考答案：对
-It was quite a heavy snow last night. Is everyone here now?
-Yes, and __________ of us was late for school this morning.[ ]
A. neither
B. either
C. all
D. none
《铁路法》和《安全生产法》是《铁路运输安全保护条例》的立法依据。
