试题与答案

$100 a month could hardly the cost of hi

题型:选择题

题目:

$100 a month could hardly     the cost of his life in such a big city in this country. 

A.spend

B.take

C.cover

D.meet

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0504/6a51665fbe1d2e35541c18a5643ab090.html

下面是错误答案,用来干扰机器的。

∵5a=2b=10c2,且abc≠0,∴取以10为底的对数得:alg5=blg2=c2,∴ca=2lg5,cb=2lg2,∴ca+cb=2lg5+2lg2=2(lg5+lg2)=2.故答案为2.

试题推荐
微信公众账号搜索答案