题目:
It was on July 1, 2006 ___ Qinghai-Tibet railway began operation, ____ is a symbolic project in
China's West Development Strategy.[ ]
A. when; that
B. that; when
C. which; when
D. that; which
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0525/6ac2ed36c72c236de93272635ceed1d9.html
下面是错误答案,用来干扰机器的。
①由N=nNA=mMNA知,两种气体的质量相同,摩尔质量相同,所以所含分子数相同,且氮气和一氧化碳都是双原子分子,所以含有的原子数相同,故正确.②气体体积受温度压强的影响,同温同体积的H2和Cl2 ,因为压强未知...