题干
—Why did Peter look upset?
—His boss asked him to leave.________，he was fired.
A：By the way
B：By accident
C：In all
D：In other words
答案(点此获取答案解析）
D
—Why did Peter look upset?
—His boss asked him to leave.________，he was fired.
A：By the way
B：By accident
C：In all
D：In other words
+ AI（OH）4— ===
向含有等物质的量的
、
的混合溶液中,慢慢滴加NaOH溶液,直至过量,发生以下离子反应: 
===
②
===AI（OH）4—③
===
===
发生反应的先后顺序正确的是