引起脑震荡及脑挫伤的原因，主要是（）
A.细菌感染
B.病毒感染
C.内源性毒物
D.毒素中毒
E.粗暴的外力作用
参考答案：E
一 What did she say?
— She said _______. [ ]
A．that she is having a surprise party for Lana
B．that the earth moves around the sun
C．why did she want to do that
D．if she will go to her house
能够有效避免考核结果可能出现趋中趋势的方法是( )。
A．交替排序法 B．强制分布法C．评价尺度表法 D．行为锚定法
