问题 单项选择题

以计算机的逻辑元器件为标志,大型机的发展大致可分为4个时代,其中第2代是( )。

A.电子管计算机

B.晶体管计算机

C.集成电路计算机

D.大规模集成电路计算机

答案

参考答案:B

解析: 根据计算机所采用的逻辑元器件的演变,将计算机的发展划分为四代。第一代采用电子管为主要逻辑元器件,第二代采用晶体管,第三代采用大规模集成电路,第四代采用大规模、超大规模集成电路。

阅读理解

I learned about life from an ant farm.When I was seven years old, my family created one.First, we put clean sand in a thin glass box, and then we waited for the live ants to arrive.Shortly after the chilly ants were dropped into the glass structure, they got to work making tunnels.I was amazed that each one knew exactly what to do.After hours of staring, I realized that the ants had assigned jobs.With my mom ' s help, I kept a diary of what happened each day and named the ants.

One day a tragedy struck the ant farm.The pages of the diary, still wrinkled where tear drops fell, indicate the depth of the tragedy.'I had put my face so close to the structure that I accidentally tipped it over, caving in all the tunnels.Although the ants survived their earthquake, one by one they began to die.I was terrified as I watched them give up their tunnel-building to carry the bodies to a comer of the farm.My mother reported that the ants were dying of "frustration." They simply could not stand the reality that their tunnels had been destroyed.

Although much time has passed, I still think of that ant farm.Mom had hoped it would teach me about the natural world, but it taught me much more.Over the years, I came to realize the ants were a study in the benefits of teamwork.Working together, they were able to create an amazing world for themselves.I also learned that they should be admired for their hard work.Day in and day out, each labored at their task.The ant farm showed that teamwork and perseverance are indeed two key ingredients to success.But there was an even larger lesson that I did not realize until recently: Adversity (不幸、灾祸) is a natural part of life,and must be accepted.Unlike the ants, humans cannot give up when they face disappointment.Unlike the ants, we have to realize that if a tunnel caves in, we just have to build another.Giving up, I say, is not a choice.

小题1:The family created an ant farm in a glass box because it was easy _____.

A.for the ants to live in

B.to get sun light in

C.to keep the sand clean

D.for the boy to observe小题2:What made the pages of the diary wrinkled?

A.The tears.

B.The earthquake

C.The ants.

D.The tragedy.小题3:What did the writer finally realize?

A.Perseverance is the only way to success.

B.Humans cannot give up when facing adversity.

C.People should admire anyone for their hard work.

D.His mother taught him much more.小题4:When did the writer draw a more important lesson from his experience?

A.Before he was seven years old.

B.When he was seven years old.

C.Immediately after the tragedy.

D.Many years after the tragedy

单项选择题