某研究性学习小组设计的实验装置(如图),既可用于制取气体,又可用于验证物质性质. (1) 写出图中仪器A、B的名称:A;B. (2) 检查如图中装置Ⅰ气密性的方法:. (3) 写出双氧水制取氧气的化学符号表达式:;利用Ⅰ、Ⅱ装置用于双氧水制取氧气的实验前准备:打开K1 , 关闭K2 , 仪器A、B中分别加入相关试剂,装置Ⅱ的集气瓶内预先加入(填物质名称). (4) 当打开K2、关闭K1时,利用Ⅰ、Ⅲ装置可验证二氧The 1930s were the year when he wrote one
_____ after another, and when his first
collection of _____ was published.
A.poem, poetry
B.poetry, poem
C.poem, poem
D.poetry, poetry