根据除尘器的除尘效率,常用的布袋式除尘效率应该大于()%,即除尘器的出口气流中不应该含有灰尘。
参考答案:99
一Was he sorry for what he’d done?
一
A No wonder B Well done C Not really D Go ahead
Though the little boy is often made ___by his brother, he made his brother ___yesterday.
A.cry; to cry
B.crying; crying
C.cry; cry
D.to cry; cry