使用最广泛的课堂观察方法是()
A．目视法
B．扫视法
C．巡视法
D．提问法
参考答案：A
I would rather _____ at home than _____ to the party.
A．staying, going
B．to stay, to go
C．stay, go
D．stay, to go
CRH1A型动车组辅助压缩机的供风量为（）L/min。
A.50
B.60
C.70
D.80
