问题 单项选择题

病理性再矿化是指()。

A.在机体生长发育成熟过程中,机体的无机离子在生物调控下在机体的特定部位与有机基质中的生物大分子结合形成具有一定结构的矿化组织

B.由于机体对生物矿化调控作用失衡,无机离子在不该矿化部位形成异位矿化或异常矿化组织,或造成矿化组织矿化过度或不足

C.在生理状态下,牙刚萌出时,唾液中的钙、磷进入釉质表层孔隙内沉淀、矿化形成磷灰石晶体

D.牙受到外界因素影响发生脱矿后,病损组织重新矿化的现象

E.将人或动物的牙釉质,经酸蚀法或酸性凝胶致人工龋的方法制成标本,然后用再矿化液或者唾液处理这些样本,观察再矿化效果和分析其中发生的变化

答案

参考答案:D

解析:备选答案是生理性矿化、病理性矿化、自然再矿化、病理性再矿化及人工再矿化的定义,考生应当记忆分辨生物矿化的定义及不同点,以便于分析判断,做出正确的选择。

单项选择题
阅读理解

The impression you make at the beginning of an interview is very important. Employers often decide to hire someone in the first three minutes of the interview. They judge you by your appearance, attitude (态度) and manners.

A friendly smile when you walk into the room is important. A smile shows a confident (自信的) and positive attitude.

When you introduce yourself, make eyes contact with the interviewer. Some interviewers offer a hand­shake. Others don’t.

Try to be as natural as possible. But pay attention to your body language. The way you sit, walk, gesture, use your voice and show feeling on your face are all parts of your body language. It makes the interviewer know how you feel about yourself and the situation you are in. Are you feeling positive about yourself? Your abilities? Your interest in the job?

Speak clearly and loudly enough. Show interest and enthusiasm in your voice. When you speak, look at the interviewer. Also don’t say negative things about yourself, or former employers.

Listen to questions carefully. If you don’t understand a question, ask the interviewer to repeat or explain.

"I’m sorry, but I didn’t catch that."

"I’m not sure exactly what you mean."

Almost everyone is nervous in a job interview. Interviewers know that. They don’t expect you to be totally calm and relaxed. But they expect you to try to control your nervousness. They expect you to show confidence in your ability to do the job.

At the end of the interview, thank the interviewer for her or him. It’s a good idea to send a short thank-you letter right after the interview, or deliver it by hand.

Phone the company if you have not heard anything after one week. Ask if they have make a decision about the job.

1. It can be inferred from the passage that ________.

A. you should always put on a smile when meeting the employer

B. you should stand still with respect before the employer

C. the first impression is very important in an interview

D. employers understand and like employees’ nervousness

2. Why should we pay attention to our body language?

A. Because it can help us win the employer’s positive impression.

B. Because it can help us feel about the employer.

C. Because it is needed by our employer.

D. Because we need it to improve our feeling.

3. The main purpose of the passage is ________.

A. to give you some advice on the art of finding a job

B. to tell from wrong about job interviews

C. to explain why we should do something about an interview

D. to suggest not being shy in an interview

4. Which of the following can be the best title for the passage?

A. A Friendly Smilew。   B. Making a Good Impression

C. Don’t Be Nervousw。D. Sending a Thank-You Letter