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【判断题】
能愿动词不同于一般动词,在句子里状语 。A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【单选题】A vessel engaged in minesweeping on the high seas carries which of the following day signals ?
A.
Two green balls in a vertical line
B.
Two black balls in a vertical line
C.
A black ball at the foretruck and yardarm ends
D.
A shape of two cones point to point
【单选题】The door and the windows were all closed and there was no _____ of forced entry. [ ]
A.
scene
B.
signal
C.
sign
D.
sight
【单选题】Scientists are sure that the color red ______.
A.
encourages athletes wearing it
B.
is a signal of vigor
C.
is superior to the color blue
D.
delivers messages of mental advantage TEXT C
【简答题】在图示的电路中,已知 C =0.1mF 。 开关 S 闭合后电路的时间常数 为( )s。
【单选题】Telecommunications stand for devices and systems that transmit electronic or optical signals across long distances. Telecommunications enables people around the world to contact one another, to access...
A.
Current development.
B.
Transmission of message.
C.
Computer networking.
D.
Government regulation.
【简答题】在单相功率测量中,如果功率表接线正确,但指针仍反转,这种情况说明 。这时为了得到正确读数,应在 之后,将 对调,但不能调换 接线端。
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