问题 单项选择题

高碳钢焊接时,为了预防焊接裂纹,一般需将工件预热到()。

A.150℃-350℃

B.250℃-400℃

C.350℃-450℃

答案

参考答案:A

阅读理解

     In 1826, a Frenchman named Niepce needed pictures for his business. But he was not a good artist,

so he invented a very simple camera. He put it in a window of his house and took a picture of his garden.

That was the first photo.

     The  next  important  date  in  the  history of photography (摄影) was in 1837. That year, Daguerre,

another Frenchman, took a picture of his reading room. He used a  new  kind  of  camera in a different

way. In his picture you could see everything very clearly, even the smallest thing. This kind of photo was

called Daguerreotype.

     Soon, other people began to use Daguerre's way. Travelers brought back wonderful photos from all

around the world. People took pictures of famous buildings, cities and mountains.

     In about 1840, photography was developed. Then photographers could take pictures of people and

moving things. That was not simple. The photographers had to carry a lot of  film  and  other  machines.

But this did not stop them, for example, some in the United States worked so hard. Mathew Brady was

a famous American photographer. He took many pictures of great people. The pictures were unusual

because they were very lifelike (栩栩如生的).

     Photography also became a kind of art by the end of the 19th century. Some photos were not just

copies of the real world. They showed ideas and feelings, like other art forms.

1. Who took the first photo?

   __________________

2. The Daguerreotype was a kind of photo, wasn't it?

   __________________

3. If a photographer wanted to take pictures of moving things in 1840, what did he have to do?

   __________________

4. Why was Mathew Brady famous?

   __________________

5. When did photography become a kind of art?

   __________________

阅读理解与欣赏

阅读下面的文字,完成问题。

  青海、新疆,神秘的古罗布泊,马革裹尸的战场,不知道稼先在那里时有没有想起过我们在昆明时一起背诵的《吊古战场文》:

  浩浩乎!平沙无垠,夐不见人。河水萦带,群山纠纷。黯兮惨悴,风悲日曛。蓬断草枯,凛若霜晨。鸟飞不下,兽铤亡群,亭长告余曰:“此古战场也!常覆三军。往往鬼哭,天阴则闻!”

  也不知道稼先在蓬断草枯的沙漠中埋葬同事、埋葬下属的时候是什么心情?

  “粗估”参数的时候,要有物理直觉;筹划昼夜不断的计算时,要有数学见地;决定方案时,要有勇进的胆识,又要有稳健的判断。可是理论是否够准确永远是一个问题。不知稼先在关键性的方案上签字的时候,手有没有颤抖

  戈壁滩上常常风沙呼啸,气温往往在零下三十多摄氏度。核武器试验时大大小小的临时问题必定层出不穷。稼先虽有“福将”之称,意外总是不能完全避免的。1982年,他做核武器研究院院长以后,一次井下突然有一个信号测不到,人们都劝他回去,他只说了一句话:“我不能走!”

  假如有一天哪位导演要摄制“邓稼先传”,我要向他建议采用五四时代的一首歌,作为背景音乐。那是我儿时从父亲的口中学到的:

  中国男儿 中国男儿

  要将只手撑天空

  长江大河亚洲之东 巍峨昆仑

  古今多 * * 丈夫

  碎首黄尘 燕然勒功 至今热血犹殷红

  我父亲生于1896年,那是中 * * 仍任人宰割的时代,他一生都喜欢这首歌曲。

1.作者引用《吊古战场文》的目的是什么?正确的说法是(     )

A.揭示战争的残酷以及给人民造成的巨大痛苦。

B.对当年在昆明时生活的怀念。

C.寄托了对邓稼先的怀念。

D.烘托了邓稼先工作环境的艰辛。

2.“不知稼先在关键性的方案上签字的时候,手有没有颤抖”一句话表现的是什么?

__________________________________________________________________

3.邓稼先简短的一句话“我不能走”,表现了他怎样的精神?

__________________________________________________________________

4.结尾处引用五四时代的一首歌,作用是什么?

__________________________________________________________________