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look at the three cakes.one is a circle .the second one is a
1年前
设10件产品中有4件不合格品,从中任取两件,已知其中一件是不合格品,求另一件也是不合格品的概率……
1年前
一个长方体的高减少4厘米后成为一个正方体,并且表面积减少48平方厘米,这个长方体的体积是______.
1年前
My mother has a lot of ()(worry) and she is always ()(worry)
1年前
I think ___ dictionary is enough for us students.A.such one
1年前