下列哪种物质为复方沙棘籽油栓的基质（）
A.可可豆脂
B.聚乙二醇
C.甘油明胶
D.S-40
E.泊洛沙姆
参考答案：C
-Attention, please. The plane has to be __________ because of the heavy rain.
-Oh, bad luck! We have to wait now.[ ]
A. put on
B. put off
C. put up
D. put away
发达资本主义国家对外关系的本质是霸权主义和强权政治。
