The Yellow River is the second          in China.

A．long

B．longer

C．longest

D．longer and longer

翼点位于哪几块骨的相接处()

A．顶骨、蝶骨、筛骨、颞骨

B．枕骨、额骨、蝶骨、颞骨

C．顶骨、额骨、筛骨、蝶骨

D．顶骨、额骨、筛骨、颞骨

E．顶骨、额骨、蝶骨、颞骨