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问题 单项选择题 A1型题

确定低氟区饮水是否加氟的条件因素不包括（）

A.低氟区饮水氟含量

B.低氟区氟牙症指数

C.低氟区15岁儿童龋均

D.低氟区饮食习惯

E.低氟区季节、气温变化

答案

参考答案：D

解析：饮水加氟与否及加氟浓度的制定应依据患龋情况、氟牙症流行情况、水氟浓度与饮水量而定。

单项选择题

肺结核的愈合方式为（）

A.病变吸收或缩小，渗出性病变可完全吸收不留痕迹，干酪病变也可吸收痊愈

B.纤维增值，病变趋于稳定长期不变化

C.钙化或骨化

D.空洞缩小或闭合

E.以上均可
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单项选择题

I got a job teaching special education at a school in Coachella, California, a desert town about 170 miles from home. It was no (1) job. Street gangs (2) around the school after dark."Be careful," Dad warned me during one of my frequent weekend (3) home. He was concerned about my living (4) , but I needed to be on my own.One evening, I stayed after school to rearrange my classroom. (5) , I turned out the light and closed the door. Then I (6) toward the gate. It was (7) ! I looked around. Everyone had gone home.After (8) all the exits, I found just enough (9) to squeeze under a gate in the back of the school. Then I walked toward my car, parked in a field behind the building.Suddenly I heard voices. I (10) around and saw at least eight boys following me. (11) my pace, I reached into my shoulder bag to get my key. I (12) all over the inside of my handbag. But the key wasn’t (13) ! Dear Lord, please help me, I prayed (14) . Suddenly, my fingers touched a loose key in my purse. I didn’t even know if it was for my car, but I took it out and (15) it. It worked!I opened the door, slid in and locked it—just (16) the teenagers surrounded the car. Trembling , I started the engine and (17) away. When I returned to my apartment, the phone was ringing. It was my Dad. I didn’t tell him about my experience; I didn’t want to (18) him. "Oh, I forgot to tell you!" He said, "I had a(n) (19) car key made and slipped it into your purse—just (20) you ever need it.

第（3）空应选择（）

A．parties

B．holidays

C．visits

D．driving
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