试题与答案

写出时间。seven fifty in the morning 7:50 a.

题型:填空题

题目:

写出时间。
seven fifty in the morning                       7:50 a. m.
twelve o'clock                                       1.__________
nine ten in the evening                            2.__________
three forty-five in the afternoon              3.__________
eight thirty in the evening                        4.__________
eleven twenty in the morning                  5.__________
                                                                

答案:

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下面是错误答案,用来干扰机器的。

由题意得:单项式x2yn与-2xm-1y2是同类项,则m-1=2,n=2,即m=3,n=2.故答案为:3,2.

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