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You ______ pay your library fines, if not, you ______ not be allowed to graduate.
11个月前
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How I wish I _______ with my mother yesterday and that she _____ me like a grown-up! [ ]
1年前
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At long last the child was found on top of ______ we call the museum of science and technology.
1年前
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求二元函数f(x,y)=x平方+y平方+xy在条件x+2y=4的的极值
1年前
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如图，把一张长方形ABCD的纸片，沿EF折叠后,ED′与BC的交点为G，点D、C分别落在D′、C′的位置上，若∠EFG=55°,求∠1、∠2的度数.
1年前