劳动经济学的研究方法主要有( )。 A．研究方法 ( B．实证研究方法 C．研究
题型：多项选择题
问题：
劳动经济学的研究方法主要有( )。
A．研究方法 (
B．实证研究方法
C．研究方法 (
题型：多项选择题
小题1:Visitors can’t enter the museum without the guard’s p_____________ .
小题2:The head of the railway station a___________ to the passengers for the late arrival of the train.
小题3:For a better environment, many old buses ought to be r with new ones using electricity.
小题4:It’s c______________ of you to bring my umbrella when it is going to rain.
小题5:It is good m_____________ to give your seat to an old man on the bus.
小题6:Be a little p_____________ . I will be ready in a few minutes.
小题7:Children are always full of c_______________; they want to know everything.
小题8: Children should not be allowed to watch the v____________ movies which are full of fierce fights.
小题9:She listened with a p____________ expression on her face because she couldn’t understand what the speaker was saying.
小题10:Doctors say many diseases can be p_____________ from spreading by 
washing our hands.