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【单选题】
交流发电机转子的作用是()A.
产生交流电
B.
交流变直流
C.
产生旋转的磁场
D.
稳定发电机的输出电压
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反馈参考答案：
举一反三
【单选题】He came to a point _______ there was no more road to follow, and before him he could see nothing but a thick forest.
A.
where
B.
what
C.
which
D.
that
【单选题】It was some time before he ______ after being knocked out.
A.
came to
B.
came back
C.
came over
D.
came across
【单选题】He came to a point ______ there was no more road to follow, and before him he could see nothing but a thick forest.
A.
that
B.
what
C.
which
D.
where
【简答题】世界人口在2011年时达到70亿,并以每年1.1%的速度增长,什么时候人口达到约80亿?【源代码及伪代码】
【简答题】对真值+55用8位二进制数的反码表示为()。(5.0分)A.A.01001000 B.B.00110111 C.C.10110111 D.D.10110110
【单选题】制作超链接时,要在一个当前页的窗口或框架中打开链接对象,应该设置的目标属性是________。
A.
_blank
B.
_parent
C.
_top
D.
_self
【单选题】Before he came to New York, he had never heard a single English word ________.
A.
speak
B.
spoken
C.
to speak
D.
spoke
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