问题 单项选择题

铸造金属舌面板最适合于下列各项,除了()

A.咬合紧

B.冠的唇舌径小

C.根管呈喇叭口状

D.深覆

E.冠的唇舌径大

答案

参考答案:E

解析:

铸造金属舌板的优点是:①金属材料强度大,耐磨耗,抗折强度大,所以该材料的修复体可制做得较薄;②由于铸造金属舌板较薄,所以牙体预备中,可少量磨除铸造金属舌板适合于咬合紧、深覆[*],[*]力大时的修复,以及牙体组织不能磨除过多的牙齿,如牙齿唇舌径小和根管呈喇叭口状(青少年恒牙尚未发育完全,牙髓腔宽大者),所以答案A、B、C、D均不能选。答案E冠的唇舌径大,说明修复肘牙体组织可相对磨除多一些,修复体舌侧可选用金属材料或瓷等非金属材料,故选E。

阅读理解

读下面的一篇短文,然后根据短文内容,将问题的最佳答案填写在题目前的括号里。

    One day we invited some friends to dinner. When it was about six o'clock, my wife found that we had

little bread.

    So she asked our five-year-old daughter, Kathy, to buy some.

    "Here's a dollar," my wife said," get two loaves (条) of bread, if they have it. If they don't have it, get

anything. But hurry!" Kathy hurried off, and we waited and waited. By a quarter past six, all the friends had

arrived. But Kathy had not returned. Finally we saw her dancing around the corner with a bright new hula

hoop (呼啦圈) whirling (旋转) round her middle.

    "Kathy!" Her mother cried. "Where did you get that hula hoop, and where is the bread?"

    "Well, when I got to the shop, they had sold all their bread," answered Kathy. "And you said 'If they don't

have that, get anything!'"

1. One day Kathy's parents invited some friends to ______. [ ]

A. has breakfast

B. have lunch

C. has supper

D. have a party

2. How much did Kathy's mother give her? [ ]

A. a dollar

B. two dollars

C. five dollars

D. six dollars

3. Kathy ______ in a hurry. [ ]

A. played games

B. went to the shop

C. went to dance

D. came back home

4. What did Kathy buy at last? [ ]

A. other food

B. nothing

C. hula hoop

D. two loaves of bread

5. Why did she do this? [ ]

A. because the shop had sold all their bread.

B. because her mother asked her to get anything if they hadn't had bread.

C. because she loved playing with hula hoop.

D. all above.

问答题