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【单选题】
判断 图面下方 指定位置的 三 个断面图是否正确。A.
A
B.
B
C.
C
D.
D
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反馈参考答案：
举一反三
【单选题】I'm doing my homework. Could you please _____ the TV a little? [ ]
A.
turn up
B.
turns up
C.
turn down
D.
turns down
【单选题】Will you __ the light? It's dark in the room. I can't see clearly. [ ]
A.
turn on
B.
turn of
C.
turn down
D.
turn up
【单选题】有两台PID调节器R1和R2,其参数整定为PB1Ti2,Tdl>Td2,这表示______。
A.
R1的比例作用比R2强,R1的积分和微分作用比R2弱
B.
R1的比例作用比K2弱,R1的积分和微分作用比R2强
C.
R1的比例、微分作用比R2强,积分作用比R2弱
D.
R1的比例、微分作用比R2弱,积分作用比R2强
【单选题】Finally, save your document before you ________ your computer.
A.
turn on
B.
turn up
C.
turn off
D.
turn down
【单选题】I'm reading now. Please tell him the TV a bit. [ ]
A.
turn up
B.
turn off
C.
to turn down
D.
turn down
【单选题】We invited her to dinner but she didn’t even bother to _______.
A.
turn in
B.
turn up
C.
turn on
D.
turn down
【单选题】__________ the radio, please. I want to listen to the weather report. [ ]
A.
Turn on
B.
Turn off
C.
Turn down
D.
Turn up
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