多项选择题

火力发电厂中，对消防供电的要求，下列哪几条是正确的？（ ）

A.单机容量150MW机组，自动灭火系统按Ⅰ类负荷供电
B.单机容量200MW机组，自动灭火系统按Ⅰ类负荷供电
C.单机容量30MW机组，消防水泵按Ⅰ类负荷供电
D.单机容量30MW机组，消防水泵按Ⅱ类负荷供电
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单项选择题
某单回采用猫头塔的220kV送电线路，若导线间水平投影距离4m，垂直投影距离5m，其等效水平线距为多少米？（ ）
A.4.0m
B.5.0m
C.7.8m
D.9.0m
未分类题
听力原文：M: The plane was supposed to arrive in Shenzhen at ten o'clock.W: Ten o'clock! But it's already ten-thirty!What does the woman mean?A.They're going to be very latE.B.The plane doesn't fly near Shenzhen.C.Tile plane is going to lanD.
A.W:
B.They're
C.
B.The
D.
C.Tile
E.
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