内墙和楼地面交界处，为保护墙脚不受污损和破坏，应做（）
A、压线条
B、踢脚线
C、护角线
参考答案：B
—Where is your father? We haven't seen each other for weeks.
—______. [ ]
A. He has gone to England
B. He is going to America
C. He would visit my grandparents
D. He has been to America
事故调查组在事故发生后应及时通知相关单位和人员；一般B类事故以上、重大以下的事故（不含相撞的事故）发生后，应在（）内通知相关单位，接受调查。
A.2h
B.8h
C.12h
D.24h
