We can't _________ his mistakes, which were made because he was too careless with his work.

A．overcome

B．understand

C．tolerate

D．recognize

隔离层

A．丙烯酸树脂Ⅱ号
B．羟丙基甲基纤维素
C．虫胶
D．滑石粉
E．川蜡