下列属于无偿合同的是（）
A.互易合同
B.赠与合同
C.居间合同
D.承揽合同
参考答案：B
患者经常出现发作性眩晕，头痛，一过性肢麻及一时性语言蹇涩。其最易引发的是
A．痉证
B．痫证
C．消渴
D．痹证
E．中风
In the past 10 years people have become more______ the safety of their privacy.[ ]
A. worrying about
B. cared about
C. concerned about
D. paid attention to
