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已知sinα+cosα=m,求sinα-cosα的值,(0度
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I was doing my homework while my parents were ________ (cook)dinner.
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They want to know ____ do to help the suffering people in the earth-stricken area. [ ]
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Today, we will begin ________ we stopped yesterday so that no point will be left out.
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AB两地相距120km,甲乙两车相对开出,四分之三小时相遇,甲乙两车的速度比是5:3,相遇时甲比乙多行了多少千米?
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