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【单选题】
Make marks _______ you have questions.A.
which
B.
in which
C.
where
D.
in where
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【单选题】You should eat more,or you will go hungr again____.
A.
in time
B.
in no time
C.
on time
D.
at no time
【单选题】听力原文：W: Well, you cleaned up the refrigerator this time. You must have been very hungry. M: All I did was fix a snack. There weren't many left-overs from yesterday. Q: What did the man do according to...
A.
Ate all the food.
B.
Cleaned the kitchen.
C.
Fixed the refrigerator.
D.
Bought some groceries.
【简答题】按照建筑制图标准规定,图纸幅面是指图纸本身的大小规格。国标规定了各种图幅尺寸,幅面代号为 、 、 、 、 。
【简答题】桥式整流电路其中一只二极管开路,则输出电压 。
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