某药降解服从一级反应，其消除速度常数k=0.0096天—1，其有效期为
A. 31.3天
B. 72.7天
C. 11天
D. 22天
E. 88天
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喉癌一般是男性多发，但是下面那一种类型肿瘤却多发于女性（）
A. 梨状窝癌
B. 环后区癌
C. 鼻咽癌
D. 腮腺腺样囊性癌
E. 气管腺样囊性癌
塑料模按模塑方法分类，可分为注射模、压缩模、（）、挤出模。
将一根电阻等于r的均匀导线，对折起来并联使用时，则电阻变为()
A. r/4
B. r/2
C. r
D. 2r
You need to design a security solution for the internally developed Web applications that meets business requirements. What should you do？（）
A. Install and configure a stand-alone root certification authorative （CA） that is trusted by all company client computers. Issue encryption certificates to all developers
B. Install and configure root certification authority （CA） that is trusted by all company client computers. Issue code-signing certificates to all developers
C. Purchase a root certification from a trusted commercial certification authority （CA）. Install the root certificated on all developers’ computers
D. Purchase a code-signing certificate from a trusted commercial certification authority （CA）. Install the certificate on all company client computer
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