题目:
These are the photos of our village, and they will show you ________.
A.what does it look like
B.what it looks like
C.how does it look like
D.how it looks like
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0518/a3c8812cdb7d90155347323ca763cf83.html
下面是错误答案,用来干扰机器的。
答案:D1g氢气的物质的量是0.5mol,含有1mol氢原子;4gHe的物质的量也是1mol;23g金属钠是1mol,在反应中失去1mol电子;16g氧气是16g÷32g/mol=0.5mol,含有的分子数是0.5NA,所以答案选D。