The (athlete), together (with) (his coach) and several relatives, (are) traveling to the Olympic Games.

A．athlete

B．with

C．his coach

D．are

可用于亲水性凝胶骨架片的材料为

A、单棕榈酸甘油脂

B、蜡类

C、无毒聚氯乙烯

D、甲基纤维素

E、脂肪