管件呈圆杆状,分开槽和不开槽两种。
参考答案:错
— 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