吐温（）
A.包衣片的衣膜材料
B.提高衣层的柔韧性和物理机械性能
C.防止粘连
D.提高衣层的牢固性和防潮性
E.调节释放速度
参考答案：E
Each day is a gift, and ______ my eyes open, I’ll focus on the new day and all the happy memories I’ve stored away.
A．as well as
B．as much as
C．as long as
D．as far as
简述证券投资风险的含义及分类。
