我国古代丝绸之路分为（）。
A.海上丝绸之路
B.北方丝绸之路
C.陆上丝绸之路
D.南方丝绸之路
参考答案：A, C
I'm sorry I can't stop with you. I have much work to do.
A．to talk
B．talking
C．talk
D．talked
如遇八级大风时,塔式起重机应锁紧夹轨器,使起重机与轨道固定。
