多项选择题

固有免疫分子有

A．补体
B．细胞因子
C．溶菌酶
D．胃酸

<上一题目录下一题>

热门试题

单项选择题

Which of these is not a reason impromptu speeches are considered more difficult?

A．The speech needs to be long enough
B．The question can be confusing
C．There is a time limit to preparation
D．The topic is unexpected

判断题

调查问卷的设计时，一般把调查目的的介绍放在结束语。正确错误

相关试题