Alcohols Similar to Hydrocarbons except for one group of chemicals. OH group. Hydroxyl group.
1. occupation n. 职业, 占有, 占领 我想知道他是干什么的。 I want to know what his occupation is. 这个国家是在 1937 年至 1945 年间处在敌人的占领 之下的。
Did nuclear weapons make the world a safer or more dangerous place from 1949-63?