问题 单项选择题

一位烟瘾很重的男性在体检中发现其颊黏膜上有一块白色隆起的斑块,而且无法用消毒纱布擦掉。最可能的诊断是()。

A.鳞状细胞癌

B.鹅口疮

C.牙龈炎

D.黏膜白斑病

E.牙周炎

答案

参考答案:D

解析:黏膜白斑病是一种癌前病变,一般表现为边缘不规则的白色隆起斑块状增生,往往影响口腔黏膜,而且无法擦掉。这种病变常发生于唇、口、颊黏膜或 * * 黏膜。高危险人群为:吸香烟者、吸烟斗者、无烟烟草使用者和酗酒者,还包括慢性口腔感染、慢性咬合不正,或者长期暴露于紫外线辐射者。一旦考虑为该病,应做活检以排除恶性肿瘤。大概10%的病变会发生恶变。念珠菌感染的症状和黏膜白斑病相似,但其病灶可以被棉签擦除。

选择题
阅读理解

阅读短文,选择正确答案。

      At the shopping mall, you probably think about spending, not saving. Think about all the lights that keep the

mall bright. Think about all the water faucets (水龙头) in the toilet. Think about all the air conditioning in

summer. Saving energy is a hot topic for such a big place!

      Many things at the mall use energy. Electric lights, infrared (红外感应) faucets and air- conditioners need

electricity to work. One way to save energy is by keeping lights clean. More and more dust and dirt make the

lights less bright. When malls keep lights clean, they can use fewer lights and keep the area just as bright. Using

fewer lights means using less energy.

      You step up to the water faucet. The water starts to flow. You don't have to touch a thing. Why do malls

have such fancy faucets? The answer is simple. They save water. Sometimes people forget to turn the water

off after they wash. Infrared faucets turn themselves off.

      The…….

1. _____ is a hot topic for a big mall.[ ]

A. To spend money

B. To Save energy

C. To keep the mall bright

D. To buy things

2. What will the fourth paragraph probably talk about? [ ]

A. How to save water when using infrared faucets irl the mall.

B. How to save energy when using air-conditioners in the mail.

C. How to save money when shopping in the mail.

D. How to spend money when shopping in the mall.

3. The best title for the passage is ______. [ ]

A. Lights, faucets and air-conditioners

B. Spending less money

C. Energy saving at the mall

D. A hot topic