试题与答案

静态RAM的特点是A.在不断电的条件下,信息在静态RAM中保持不变,故而不必定期刷新

题型:单项选择题

题目:

静态RAM的特点是

A.在不断电的条件下,信息在静态RAM中保持不变,故而不必定期刷新就能永久保存信息

B.在不断电的条件下,信息在静态RAM中不能永久五条件保持,必须定期刷新才不致丢失信息

C.在静态RAM中的信息只能读不能写

D.在静态RAM中的信息断电后也不会丢失

答案:

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题型:阅读理解

阅读理解。

     As a boy, there was nothing I liked better than Sunday afternoons at my grandfather's farm in western

Pennsylvania. Surrounded by miles of winding stone walls, the house and field provided endless hours of

fun for a city kid like me. I was used to tidy living rooms that seemed to whisper, "Not to be touched!"

     I can still remember one afternoon when I was eight years old. Since my first visit to the farm, I had

wanted more than anything to be allowed to climb the stone walls surrounding the houses. My parents

would never  approve. The walls were old; some stones were missing, others loose and falling. Still, I

entered the living room, where the adults had gathered after Sunday dinner.

     "I, uh-I wanna climb the stone walls," I said. Everyone looked up. "Can I climb the stone walls?  

Immediately voices of disagreement went up from the women in the room." Heavens, no! You'll hurt

yourself!" I wasn't too surprised; the response was just as I'd expected. But before I could leave the

room, I was stopped by my grandfather's loud voice. "Now hold on just a minute," I heard him say, "Let

the boy climb the stone walls. He has to learn to do things for himself.""Go", he said to me, "come and

see me when you get back." For the next two and a half hours I climbed those old walls  and had the time of my life. Later I met with my grandfather to tell him about my adventures. I'll never forget what he said. "Fred", he said, smiling, "You made this day a special day just by being yourself. Always remember,

here's only one person in this whole world like you, and I like you exactly as you are."

     Many years have passed since then, and today I host the television program Mister Rogers

Neighborhood, seen by millions of children throughout America. There have been changes over the years, but one thing remains the same: my message to children at the end of almost every visit. "There's only one

person in this whole world like you," the kids can count on hearing me say, "and people can like you

exactly as you are."

1. When the writer was a little child, he lived _________.

A. in the city 

B. on the farm    

C. with his grandparents

D. away from his parents

2. The writer enjoyed his visits to the farm because ___________.

A. there were old women there

B. it was an exciting place for him

C. he liked his grandfather

D. the living room there was clean

3. The underlined word "approve" in paragraph 2 means ____________.

A. prove

B. suppose

C. allow

D. mind

4. What did the writer learn from his grandfather and his own experience on the farm?

A. To do things for others

B. To do whatever he liked.

C. To be proud of himself

D. To be himself.

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