土地二级市场的经济内容主要涉及土地的转让、出租和( )
A．划拨
B．出让
C．抵押
D．交换
参考答案：C
— I telephoned him twice and I couldn't get through to him.
— I think that the line might have been out of order, ______? [ ]
A. don't you
B. wasn't it
C. do you
D. hadn't it
与下颌管关系密切的牙是（）
A.下颌第一前磨牙
B.下颌第二前磨牙
C.下颌第一磨牙
D.下颌第二磨牙
E.下颌第三磨牙
