"Please _____ the coat." the clerk said.[ ]
A. try to
B. try on
C. try your best
答案:B
5岁小儿头面颈双上肢烧伤,面积为:()
A.34%
B.25%
C.29%
D.27%
E.31%
计算机在色谱仪中的应用可以带来什么优点?