保密工作必须以()为主,把工作重点放在预防上,最大限度地()窃密泄密事件的发生。
A.查处;减少
B.防范;减少
C.查处;杜绝
D.防范;杜绝
参考答案:B
She showed the visitors around the museum,the construction ________ had taken more than three years.(2011·江西)
A.for which
B.with which
C.of which
D.to which
氨基苷类抗生素中更容易发生过敏性休克的是()
A.链霉素
B.妥布霉素
C.庆大霉素
D.卡那霉素
E.新霉素