_____ kind of movies do you like? [ ]
A. Whose
B. What
C. Where
D. How
答案:B
组织脱水剂中,在电镜标本制作时常用作中间脱水剂的是()
A.还氧己环
B.环己酮
C.异丙醇
D.叔丁醇
E.乙醇
何谓治燥剂?