小于1000立方米的储气罐与明火、散发火花地点的防火间距为（）m。
A.20
B.30
C.10
参考答案：A
Last Saturday, a snowfall shut down airport runways across Europe, _____ numerous flights. [ ]
A. causing
B. to cause
C. caused
D. having caused
机组正常运行发电时，写出旁路反馈、油压泵过载、Orbivibl振动信号、液压油位及齿轮油堵塞信号的状态（0或1）。
