吸痰时应注意
A.贮液瓶内吸出液应及时倾倒
B.检查管道连接和吸收器性能
C.吸痰管每次使用后更换
D.痰液黏稠,可配合叩击
E.每次插入吸痰时间不超过5秒
参考答案:A,B,C,E
It was a______ that he was born on his mother’s birthday.
A.fact
B.satisfaction
C.coincidence
D.experience
惯性振动筛的特点是什么?