问题 选择题

一个多边形的每一个外角都等于360,它的边数是(    )

A.9

B.10

C.11

D.12

答案

答案:B

题目分析:任何多边形的外角和等于360°,可求得这个多边形的边数.再根据多边形的内角和等于(n-2)•180°即可求得内角和。

∵任何多边形的外角和等于360°,

∴多边形的边数为360°÷36°=10.

点评:本题需仔细分析题意,利用多边形的外角和求出边数,从而解决问题.

阅读理解

阅读理解。

    Willa Cather once said, "When people ask me whether writing has been a hard or easy

road,I always answer with the famous saying: The end is nothing;the road is all. That is

what I mean when I say writing has been a pleasure. I have never used the computer with

the thought that one more task had to be done."

    Like most writers, Willa Cather did not write books for the money that they brought her,

but rather for the pleasure that came in their writing. Her works were, like her, simple and

full of the vigor of her days in Nebraska, where she grew from child to young womanhood

and where she developed a deep love for the treeless land of the great plain with its wild

flowers, wheat fields and rivers.

    "It's a rather strange thing about the flat country," she wrote later. "It takes hold of you or

it leaves you perfectly cold. A great many people find it very dull; they like a church tower,

an old factory, a waterfall, the country all made to look like a German Christmas card...But

when I come to the open plain, something happens. I'm home. I breathe differently."

1. Willa Cather wrote because she found writing _____. [ ]

A. simple and lively

B. opened up a road to success

C. neither too hard nor too easy

D. interesting and enjoyable

2. What was the place like where Cather grew up? [ ]

A. It was cold,plain and without a church.

B. It was vast,open and flat.

C. It was like a German Christmas card.

D. It was a colorful world of wild flowers.

3. When she said "It takes hold of you or it leaves you perfectly cold.", Willa Cather

    meant that _____. [ ]

A. you either love the place or hate it

B. you decide either to stay or to leave

C. some find the place warm; others find it cold

D. some find the place peaceful; others find it wild

4. What happens when Cather comes to the open plain? [ ]

A. She breathes differently from others.

B. She wants to make the place her home.

C. She feels completely comfortable.

D. She finds the place similar to her home.

单项选择题 A1型题