下列变化中属于分解反应的是（ ）
A．分离液态空气制氧气
B．加热氯酸钾和二氧化锰制氧气
C．蜡烛燃烧
D．粗盐提纯
答案：B
—Sorry. I ________ to post the letter for you.
—Never mind. ________ it myself after school.
A．forget; I’d rather post
B．forgot; I’ll post
C．forgot; I’m going to post
D．forget; I’d better post
炉况失常的基本类型有哪些？
