The Roman alphabet is a Greek invention, ______ is the marathon, a long distance race created in honour of a Greek soldier.

A．which

B．what

C．that

D．as

卵巢巧克力囊肿是（）

A.含有巧克力样物质的囊肿

B.卵巢子宫内膜异位囊肿

C.卵巢黄素化囊肿

D.卵巢异位妊娠

E.卵巢非赘生性囊肿