急性肾小球肾炎涉及的病位主要为( )
A．心脾肾
B．脾肝肾
C．肺脾
D．脾肾
E．肺脾肾
参考答案：C
如果拍片时发现颌骨体内边缘清楚的卵圆形致密影，直径2～4mm，与牙根无关，应诊断为
A．内生骨疣
B．牙瘤
C．牙骨质瘤
D．致密性骨炎
E．根尖肉芽肿
The large size and roughly circular shape of the Pacific made some scientists think that it ______ a hole left when the moon separated from the earth.
A．used to be
B．would have been
C．might have been
D．should have been
