问题 单项选择题

我国生产的大理石装饰板材,厚度多为20mm,而发达国家向薄型板材方向发展,最薄可达到下列哪一种尺寸()

A.18mm

B. 15mm

C. 10mm

D. 7mm

答案

参考答案:D

解析:

参见《建筑材料》,符芳主编,P.28。[注:薄型石材是指厚度在10~15mm之间的石材板材;超薄型石材是指石材厚度在10mm以下的各类石材板材。现在已经可以将大理石板材做到最薄达2mm,规格最大可以做到1200mm×2400mm(厚度随规格增大而增加);花岗岩板材厚度最薄可达3mm,规格最大可以做到1200mm×1200mm。]

阅读理解

Two strangers were sitting together in a plane . They were on a long journey . One of the men was a teacher . The other was a farmer .

They sat without talking for a while , then the farmer said , “ Let’s do something to pass the time .”

“ What do you want to do ?” the teacher asked .

“ We can ask each other riddles (谜语 ),” the farmer said, “ You start.”

“ Let’s make the rules first ,” the teacher said . “ And to make the game more interesting , let’s play it for money . If we don’t know the answer to the riddle , we have to pay a dollar .”

The farmer thought about this for a while , then he said , “ That’s not fair(公平 . You are a teacher , an educated ( 受过教育的) man . You know more things than I do . I am just a farmer .”

“ That’s true ,” the teacher said , “ What do you think we should do ?”

The farmer said , “ If you don’t know the answer to a riddle ,you pay me 100 dollars .If I don’t know the answer to the riddle , I’ll pay you 50 dollars.”

The teacher thought for a while , then he said , “ OK. That’s fair . Who’ll go first ?”

“I will ,” the farmer said . “ Here’s my riddle . What has three legs when it walks , but only two legs when it flies ?”

The teacher thought and thought , “ What has three legs when it walks, but only two when it flies ?” Then he said , “ That’s a good one . I don’t know the answer .” He gave the farmer 100 dollars and said , “ Tell me the answer . What is it ?”

“ I don’t know , either .” The farmer said , and gave him 50 dollars .

小题1:At first the two men sat there without talking because ________ .

A.the farmer didn’t like the teacher

B.the teacher didn’t like the farmer

C.the farmer liked to tell jokes

D.they didn’t know each other小题2:The farmer wanted to __________ .

A.make the journey interesting .

B.see if the teacher was lucky

C.know if the teacher was clever .

D.make friends with the teacher .小题3:The teacher thought at first that the farmer __________ .

A.would fail the game

B.knew more then he.

C.could answer any riddles .

D.would win the game .小题4:From the short story we know that __________ .

A.the teacher was cleverer than the farmer .

B.an educated man is not always clever.

C.both of the two men could know the answer

D.Neither of the two men was clever.小题5:The best title of this story is __________ .

A.How to Answer Riddles .

B.A Rich Teacher.

C.A Way of Getting Money.

D.A Clever Farmer.

单项选择题 案例分析题