通常在4～6岁以后逐渐减少而自行消失的不良习惯是（）
A.下颌后缩畸形
B.佝偻病
C.维生素A缺乏
D.吮指习惯
E.舌习惯
参考答案：D
Black broke his leg. He has just had_______ X-ray examination. _______ doctor said he needed _______ operation.
A．a; The; an
B．a; A; an
C．an; A; an
D．an; The; an
一旦发现膀胱癌应尽早全膀胱切除。 （）
