问题 单项选择题 A1型题

下列为牙周疾病的局部促进因素,除外()。

A.牙石

B.酸甜的食物

C.异常大的咬合力

D.不良修复体

E.软垢

答案

参考答案:B

解析:在备选答案中的A、C、D、E选项的内容都是牙周疾病病因中的局部刺激因素,而酸甜的食物是龋病的病因因素,并非牙周疾病的促进因素,因此选B。考的知识点是区分牙周疾病与龋病局部因素的不同。

阅读理解

阅读理解。

     Joe and Helen Mills had two small children. One was six and the other four. They always resisted going to

bed, and Helen was always complaining (抱怨) about this and asking Joe for help. But as he did not come home until after they had gone to bed during the week, he was unable to help except at weekends.

     Joe considered himself a good singer, but really his voice was not at all musical. However, he decided that,

if he sang to the children when they went to bed, it would help them to relax, and they would soon go to sleep.

     He did this every Saturday and Sunday night until he heard his small son whispered to his younger sister,

"If you pretend that you're asleep, he stops."

1. The children always resisted going to bed, which ______.

A. made Helen puzzled

B. satisfied their mother

C. Helen was not satisfied with

D. gave Helen much trouble

2.The husband couldn't help the wife to look after the children ______. 

A. because he returned from work too late

B. since his voice sounded like a singer's

C. except on Saturday and Sunday

D. for he did not come home until after the children had gone to bed at weekends

3. Joe worked _______.

A. all the week including Saturday and Sunday

B. every day but Saturday and Sunday

C. during the week including the weekends

D. every day except on Sunday

4.Which of the following conclusions can we draw from the above story?

A. Joe's song did help the children to relax.

B. With Joe's help, the children went to sleep.

C. The wife must be thankful to her husband for the great help.

D. The children were so tired of their father's voice that they pretended to be asleep.

单项选择题