氧化锌丁香油黏固粉的用途哪项除外（）
A.窝洞的暂封剂
B.安抚充血牙髓
C.中深龋洞垫底
D.深龋内层垫底
E.根管充填材料
参考答案：C
_____ years ago, very large animals called dinosaurs _____ in some areas of the world. [ ]
A. Many million; have been living
B. Million; had lived
C. Several millions of; are alive
D. Millions of; lived
最易发生幽门梗阻的溃疡是
A．胃窦部溃疡B．十二指肠壶腹溃疡C．幽门管溃疡D．球后溃疡E．复合性溃疡
