仅可杀灭细菌繁殖体，达到消毒要求的是什么消毒剂？（）
A.高效消毒剂
B.中效消毒剂
C.低消毒剂
参考答案：C
There’s no point __ to persuade him to do anything.
A．to try
B．in trying
C．of trying
D．if you try
