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【单选题】
用于一号线正线道岔的S700K型电动转辙机采用( )方式A.
交流内锁闭
B.
直流内锁闭
C.
交流外锁闭
D.
直流外锁闭
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【判断题】The irrigation tool of hudou is regarded as one of the earliest tools to put lever theory into practice.
A.
正确
B.
错误
【单选题】Which of the following sentences has the word “lever” with the same meaning and usage as that in “corruptly using the levers of government "?
A.
Pull the lever towards you to adjust the speed.
B.
The threat of sanctions is the most powerful lever for peace.
C.
I levered the lid off the pot with a knife.
D.
They managed to lever the door open.
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