偏见产生的原因有人格心理因素、社会化和（）
A.人之对象特点
B.利害冲突
C.原有认知结构制约
D.认知模式制约
参考答案：B
— Which book would you like to borrow?
— ______ of the two books is OK with me. [ ]
A. Either
B. Both
C. Any
D. None
Tenax-TA吸附管采样后，密封吸附管的两端，放入可密封的金属或玻璃容器中，样品最长可保存（）d。
A.3
B.5
C.7
D.14
