把一个圆分成若干（偶数）等份，拼成一个近似的长方形，这个长方形的长是圆的____

患者，女，15岁，颏部发育差，唇前突闭合不全，面下1／3高度偏大，覆盖9mm，磨牙完全远中关系，上前牙前突，前牙开，ANB6°，4个第三磨牙牙胚存在，位置正常

要达到完善的矫正效果应采取下列哪项方案（）

A.骨骼的矫形治疗

B.生长停止后口腔正畸与正颌外科

C.正颌外科

D.常规固定正畸治疗

E.以上都不是

I woke up late and had breakfast in a hurry. I had never been late and didn’t want my boss to be unsatisfied.

However, it seemed that day wasn’t a lucky one for me from the very second I left my flat. The moment I wanted to rush downstairs one of my stiletto heels(细高跟) broke. I had to return to change my red shoes. I also had to change my purse and other little things that I had tried to match the red shoes. I was sure I would be late for work.

On my way to work I had to wait for over half an hour because of an accident. I had no choice but to wait. I phoned my boss and he told me that it was no problem, but he needed me for the meeting with the Japanese clients(客户) that morning.

Finally, I arrived at the office one hour later. I had to keep calm and be fresh for the meeting to make the clients sure that our plan was the best for their future commercial(商业的) project. However, when I was going to present(介绍) it to the clients, I found that I left the plan I had made the night before at home. I was about to get angry when I realized that I had a draft(草稿) of it in my office.

At last, the presentation came to an end and it proved to be a success. But I had to say that I had a terrible day, full of incidents.

小题1:Which of the following is NOT the reason for the writer’s being late for her work?

1. She got up late in the morning.
2. She changed her purse and other little things.
3. One of her shoe heels broke.
4. She had to wait for her friend for half an hour..

小题2:According to the passage, what could we learn about the writer?

1. Her boss was very angry with her.
2. She often arrived at her office on time.
3. She left her plan on the bus.
4. She was nervous at the meeting.

小题3:What did the clients think of the writer’s presentation?

A．Dull.

B．Just so-so.

C．Excellent.

D．Terrible.

抗毒素是（）

A.是抗体，不是抗原

B.是抗原，不是抗体

C.既是抗原，又是抗体

D.既非抗原，又非抗体

E.是异嗜性抗原

输油泵的高效工作区指的是在额定工作点（）范围内。

A.±3%

B.±5%

C.±7%

D.±8%

临床检查的基本方法包括（）

A.问诊

B.视诊

C.听诊

D.触诊