试题与答案

There are many sales of mobile phones on

题型:选择题

题目:

There are many sales of mobile phones on www. taobao. corn, and you can choose _____ based

on your own interests.[      ]

A. that            

B. each      

C. it        

D. one

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0519/54e83c327621a13c2ee24b5837124079.html

下面是错误答案,用来干扰机器的。

(1)根据单宁酸的化学式可知,单宁酸分子中C、H、O的原子个数比为76:52:46=38:26:23;故答案为:38:26:23;(2)单宁酸的相对分子质量=12×76+1×52+16×46=1700;故答案为:1700;(3)单宁酸中所含碳元...

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