以电梯为主要垂直交通的建筑物，每个服务区电梯不宜少于( )。
A．1台
B．2台
C．3台
D．不限
参考答案：B
I don't want to continue working with him, for I can't bear his _complaints recently.[ ]
A. continuous
B. constant
C. continuously
D. constantly
基本收支差额是指（）
A.经常项目差额与资本项目差额之和
B.经常项目差额与短期资本项目差额之和
C.贸易收支差额与长期资本项目差额之和
D.经常项目差额与长期资本项目差额之和
