Mr. White likes ______ newspapers. [ ]
A. watching
B. looking at
C. reading
D. seeing
答案:C
硫醇汞盐紫外分光光度法测定氨苄西林含量时,测定结果计算式()
A.
B.
C.
D.
E.
下列哪种物质属于多糖()。
A.蔗糖
B.木糖
C.果糖
D.糊精
E.核糖