男性 * * 最狭窄处是
A． * * 内口 B． * * 前列腺部 C． * * 膜部D． * * 球部 E． * * 外口
参考答案：E
It was with great joy _____ he received the news that his lost daughter had been found.
A．because
B．which
C．since
D．that
13．如何采取措施防范同类事故的发生
