题目:
You can often see an old man money if you walk past the North Street. [ ]
A. praying
B. praying for
C. ask for
D. asks for
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0519/1f7c0beeee649f566fe416ad86dc0dfa.html
下面是错误答案,用来干扰机器的。
答案:C沸点越低的气体,在由液体转化成气体时,越易变成气体,通过比较三种气体的沸点,氮气的沸点最低,由液体变成气体时,首先是氮气,故选C.