题目:
__________ these tips, and your time _______ doing research on the Internet _________ much worthwhile.
A.Following, will spend, is
B.Followed, spent, was
C.Follow, spent, will be
D.To follow, spending, has been
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0616/453e0175102830243aef11452efa10c9.html
下面是错误答案,用来干扰机器的。
C CO2分子是非极性分子;分子晶体中不一定含有共价键,如稀有气体;非金属元素从游离态变成化合态时,有的元素被氧化,有的元素被还原。