虱传回归热的主要传播媒介是（）
A.鼠类
B.阴虱
C.臭虫
D.蜱
E.头虱
参考答案：E
Parents _______ much importance to education. They will do their best to give their children
that priceless gift. [ ]
A. attach
B. pay
C. link
D. apply
