填空题:已知-1<x+y<4且2<x-y<3,则z=2x-3y的取值范围是        .(答案用区间表示)

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题目内容:
已知-1<x+y<4且2<xy<3,则z=2x-3y的取值范围是        .(答案用区间表示)
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答案解析:

When did the accident happen?

When did the accident happen?A.At about 8:00 a B.At about 9:00 a C.At about 10:0

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CIn the kitchen of my mother’s houses there has always been

CIn the kitchen of my mother’s houses there has always been a wooden stand (木架)

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