保证保险的种类有()。
A.职业责任保险
B.雇主责任保险
C.产品保证保险
D.忠诚保证保险
E.合同保证保险
参考答案：C, D, E
The news reporters hurried to the airport only _____ that the film stars had left.
A．to tell
B．to be told
C．telling
D．told
诊断主动脉瓣关闭不全最重要的体征是
A．周围血管征B．主动脉瓣区叹气样舒张期杂音向心尖传导C．主动脉瓣区第二心音减弱或消失D．心尖抬举样搏动E．主动脉瓣区吹风样杂音向颈部传导
