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【判断题】
( ) PLC的用户程序存储器用来存放用户根据控制任务编写的程序。
A.
正确
B.
错误
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参考答案:
举一反三
【单选题】在放大电路为共射电路时,若输入为正弦波,用示波器观察输入、输出波形,两波形的相位关系为()。
A.
同相
B.
反相
C.
相差90°
D.
不定
【判断题】我国>规定资产负债表是多步式结构。()
A.
正确
B.
错误
【单选题】_______ pretty your dress is ! Where did you get it ?
A.
How
B.
How a
C.
What
D.
What a
【单选题】基本共射放大电路中,输入正弦信号,现用示波器观察输出电压 uo和uI的波形,二者相位 。
A.
相同
B.
相反
C.
相差 90°
D.
相差 270°
【单选题】共射极放大电路,输入正弦信号,在不考虑电容效应时,作用示波器观察输入电压和集电极输出电压的波形,二者相位相差( )度。
A.
0
B.
90
C.
180
D.
270
【判断题】The Front Desk is usually located at the back of the hall.
A.
正确
B.
错误
【单选题】—How did you get to know Joan?—I met her onthe
A.
11. —How did you get to know Joan? —I met her onthe farm and  ___________ her. A. did friends with         
B.
made a friend with
C.
became friend to
D.
made friends with
【单选题】“How did you get to my office so quickly?”---____ bus.
A.
by
B.
with
C.
into
D.
in
【单选题】—How did you get to the museum? You're new in Shanghai. —A _____ girl knew the way and she showed it to me. [     ]
A.
local
B.
social
C.
foreign
D.
strange
【单选题】The front desk is over there .
A.
会议室
B.
书桌
C.
前台
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