愈风宁心分散片是常用的（）
A.高血压用药
B.咳嗽用药
C.失眠用药
D.便秘用药
参考答案：A
本地网中的端局根据组网需要，端局以下还可接（）等用户装置。
A、远端用户模块
B、用户集线器
C、PABX
D、专线
John passed the examination though he had only spent _______ on the subject as others had done.
A．as half time much
B．as half much time
C．half as time much
D．half as much time
