中国传统行政文化的主要内容有（）。
A.开放与平等原则
B.大一统的信念
C.集权主义的价值和原则
D.人治与礼治的原则
参考答案：B, C, D
Safety in school has been of great concern because of the frequent reports ________ students got
injured or killed while in school. [ ]
A. that
B. when
C. which
D. what
3个铁原子_____，2个氧气分子_______．2个氮原子____，金属钠____．10个水分子______，氖气_______．
