—How much water is there in the glass?
—Only _____. [ ]
A. a few
B. few
C. a little
答案:C
常用的非生物降解型植入剂材料是
A.聚乳酸B.硅橡胶C.卡波姆D.明胶-阿拉伯胶E.醋酸纤维素
常用于固定血液涂片的固定液是
A.甲醇
B.75%酒精
C.乙酸
D.福尔马林
E.乙醇