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第1题

求此微分方程ydx=xdy的通解 Ay=Cx OB.y=3+x ocy=3x D.y=x
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第2题

– Would you like to go shopping with me? – _________________(本题1.0分) A、 All right. B、 That.s all right. C、 No,
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第3题

What does Not the author tell us in part one in order to introduce his opinion? A、 A teenage salesgirl was unable to
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第4题

– How about going to see a film tonight? –(本题1.0分) A、 Oh, it couldn’t be better. B、 Yes, I will go. C、 Of cour
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