喉咽异物经常停留于（）
A.梨状窝
B.喉入口
C.舌根部
D.会厌谷
E.环后隙
参考答案：D
You can_____ this English programme_____ the air easily with your short-wave radio.
A．pick out; over
B．pick up; on
C．choose; through
D．choose; by
诉讼时效指的是权利人丧失______
A．胜诉权B．起诉权C．实体权D．追回权
