Li Lida became the youngest person ever to cross the channel () Hainan Island and the mainland.

A．among

B．between

C．from

D．near

疫疔的疡形特点为（）

A.疡形如脐凹

B.疡大如梅李

C.溃口如蜂窝状

D.容易腐烂

E.坚硬根深，如钉丁之状，溃疡坚硬根深