生产105件产品,全部合格,合格率是105%。[ ]
错误
在制作口腔上皮细胞时,为了更清楚地观察细胞的结构,可以对细胞进行染色,用的染料是( )
A.蒸馏水
B.清水
C.碘液
D.生理盐水
I really enjoy listening to music()it helps me relax and takes my mind away from other cares of the day.
A. because
B. before
C. unless
D. until