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【单选题】
Nanotechnology has resulted in a wide range of amazing, practical discoveries such as stain-resistant trousers and self-cleaning toilets.A.
Y
B.
N
C.
NG
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反馈参考答案：
举一反三
【简答题】乙醛的化学性质很活泼,能发生()、()等反应。
【简答题】密封塑料袋装婴儿均化食品,其中马铃薯占 30% ,胡萝卜占 35% ,芹菜占 30% ,还有 5% 的其他配料,净重为 250 克
【单选题】— Whom would you rather have ____ with you, Mary or Jane? — ___. [ ]
A.
to go; Either
B.
go; Either
C.
gone; Neither
D.
going; Anyone
【单选题】如果气缸内最高爆发压力约为8.OMPa,示功图纸高度为50mm,则选用弹簧比例应为——
A.
8mm／MPa
B.
7mm／MPa
C.
6mm／MPa
D.
5mm／MPa
【简答题】— Which of these hats do you want? — _______ . Either will do. A: I don't mind B; No problem C; Go ahead
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