— Who invented _____ cell phone? 

— I don't know. Maybe _____ European. [ ]

A. the; an

B. the; a

C. /; /

D. a; the

卵巢的形态学特征正确的是

A．成年妇女卵巢重约5～6g

B．卵巢表面有腹膜覆盖

C．卵巢白膜是一层平滑肌组织

D．髓质内含数以万计的原始卵泡

E．以骨盆漏斗韧带与子宫相连