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Everyone was_________when they heard the________news.
1年前
I wonder how many ______ (手术) ORBIS doctors perform during their visit to a poor country.
1年前
用简便方法计算: (1)201×32-32 (2)137-87-13+63 (3)36+99×36
1年前
已知函数f(x)=2x^2/(1-x)^2 (1)求f(x)的单调区间与极值 (2)求曲线y=f(x)的凹凸区间与拐点
1年前
梯形的面积是十平方米,上底是一点五米,高是五米,下底是多少米?
1年前