China won't be a fast-growing but fragile country. It has to develop it's military strength in order to make

any power think twice _____ trying to offend China's key interests. [ ]

A. before

B. when

C. while

D. until

关于婴幼儿外阴炎，下列哪项不恰当

A．外阴炎常与 * * 炎并发

B．久治不愈者应排除 * * 异物

C．婴幼儿外阴炎以淋菌感染最常见

D．主要表现为外阴红肿，分泌物多

E．婴幼儿抵抗力差，易发生外阴炎