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【多选题】
关于WINDOWS窗口的概念,以下说法错误的是 ()。A.
屏幕上只能出现一个窗口
B.
屏幕上可出现多个窗口,但只有一个窗口是活动的
C.
屏幕上出现几个活动窗口由用户确定
D.
屏幕上可以出现多个窗口,且可以有多个窗口处于活动状态
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举一反三
【单选题】听力原文：W: Ron, what are you doing? M: Ah, nothing. I'm just looking up some information on the Internet. W: Like what? Let me see. M: No, no, it's okay. I mean, you know. W: Baldness? What are you looki...
A.
He looks for some information far his hair loss.
B.
He seeks some information for his company.
C.
He relaxes himself by reading some news on the Net.
D.
He emails some information about the treatment of hah' loss.
【单选题】两个接触器控制电路的联锁保护一般采用( )
A.
串接对方控制电器的常开触点
B.
串接对方控制电器的常闭触点
C.
串接自己控制电器的常开触点
D.
串接自己控制电器的常闭触点
【单选题】听力原文：Jane: Ron, what are you doing? Ron: Ah, nothing. I'm just looking up some information on the Internet. Jane: Like what? Let me see. Ron: No, no, it's okay. I mean, you know... Jane: Baldness? Wha...
A.
Extreme stress.
B.
Hair loss.
C.
Declining health.
D.
Unemployment.
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