颈静脉怒张见于
A．胸腔积液B．高血压C．右心功能不全D．主动脉瓣关闭不全E．甲状腺功能亢进症
参考答案：C
The man, suspected________having stolen the jewels of the shop, was missing last night, although
he was watched over by the police. [ ]
A. of
B. for
C. about
D. with
在工作场所恶劣的情况下，人体所接触的电压只要达到（）就会有致命的危险。
A、10～20V；
B、20～30V；
C、30～40V；
D、40～50V。
n the jewels of the shop, was missing last night, although