问题描述：
That young man was seen pulling out___appeared to be a handgun and aiming it at that traffic offic
A what B which 怎么判断它不是定于从句的
A what B which 怎么判断它不是定于从句的
问题解答：
我来补答展开全文阅读
问题描述：
问题解答：
我来补答