Can I use that Teddy Bear ______ a pillow?[ ]
A. as
B. for
C. with
D. about
答案:A
简述金融交易的核算原则
紫外分光光度计的光源
A.汞灯或氙灯B.钨灯C.氢灯D.能斯特灯E.紫外光灯