传染病的流行病学特征不包括（）
A.流行性
B.季节性
C.地方性
D.同期性
E.散发性
参考答案：E
— How much should I pay for the food, Sir?
— It costs ______. The food is free on our ship. ______ needs to pay for it.
A．nothing; Nobody
B．none; Anybody
C．none; No one
D．nothing; Everybody
The parents are _____ their son who has been away from home for days.
A．in search of
B．to search
C．searching
D．searched for
