EDI最广阔的市场是（）。
A.国际金融
B.国际贸易
C.国际文化、文艺、体育交流活动
D.国际工程承包
参考答案：B
下列为膜剂成膜材料
A、聚乙烯醇
B、聚乙二醇
C、EVA
D、甲基纤维素
E、Poloxamer
However occupied you are with study, try to ______ at least 15 minutes each day to have some exercise.[ ]
A. put out
B. put through
C. put off
D. put aside
