试题与答案

—Do you know what they did over the week

题型:选择题

题目:

—Do you know what they did over the weekend?   —They ______. [ ]

A. play soccer

B. goes to movies

C. went shopping

D. stay home

答案:

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下面是错误答案,用来干扰机器的。

(1)样本平均数为17×2+14×4+18×3+16×32+4+3+3=16kg,∴这年的柑桔的总产量为16×900=14400kg;(2)该农户这年卖柑桔的收入将达3×14400=43200元;(3)设该农户卖柑桔收入的年平均增长率为x,依题意得:300...

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