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【简答题】
“别了,我的母校”,“别上校徽”,“别走了”三个“别”是 。
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【单选题】They were also asked to take tests from【B16】______their IQs could be estimated.
A.
that
B.
which
C.
whom
D.
who
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【简答题】Mental Activities Help Save Memory Doing mental activities is helpful. Reading books and writing at any age may save memory, a new 1____ ( ) finds. The study was conducted by some American neurologis...
【简答题】纯电阻性的单相半波可控整流电路,U2=220V,电阻为10欧姆,当触发角为90度时输出直流电压的大小是()V
【单选题】They were also asked to talk about their mental activities during childhood, in their youth, during middle age and at their _______ age.
A.
rate
B.
involved
C.
faster
D.
current
【简答题】像-3，-2，-9，0.78，…这样的数是______．
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