水溶性薄膜衣料是()
A.卵磷脂
B.单硬脂酸丙二酯
C.黄原胶
D.聚山梨酯60
E.聚乙二醇
参考答案:E
These football players were not specially ___ until they joined our club.
A.educated
B.exercised
C.practiced
D.trained.
只有当现货价格明显高于期货价格时,才可进行期现套利。( )