Miss Li is a teacher, and Meimei is student. [ ]
A. his
B. my
C. her
D. she
答案:C
不能在体表进行检查的鼻窦为
A.上颌窦
B.额窦
C.筛窦
D.蝶窦
E.以上都不是
工业生产上愿意采用()反应,可稳定生产,减轻操作个人劳动强度。