龋病按发病情况分类为
A.窝沟龋、平滑面龋、根面龋B.急性龋、慢性龋、继发龋C.儿童龋、成年龋、老年龋D.牙釉质龋、牙本质龋、牙骨质龋E.浅龋、中龋、深龋
参考答案:B
There are ____________ on the table.[ ]
A. two bags of tomatos
B. two bags of tomatoes
C. two bag of tomatoes
D. two bags of tomato
Grey-Turner征是指().
A.上腹可扪及肿块,有肌紧张及反跳痛
B.明显腹胀,肠鸣音稀少而低
C.急性胰腺炎时见胁腹皮肤呈灰紫色斑
D.急性胰腺炎时见脐周皮肤青紫
E.胆总管或壶腹嵌顿性结石时出现黄疸