问题 问答题 简答题

以“北京人都是中国人,有的北京人不是工人”为前提,能否必然推出下列结论?为什么?1.有的工人不是中国人。2.有的中国人不是工人。

答案

参考答案:

1.不能,因为它们组成的三段论犯有大项扩大的错误。

2.可以推出。因为它们能够组成有效的三段论。

单项选择题
阅读理解

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 (摄影术) was in 1837. That year, Daguere,

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

a Daguerreotype.

     Soon, other people began to use Daguere'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. These

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

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

copies of the real world. They showed feelings like other kinds of art.

1. The first photo taken by Niepce was a pictures of ______. [ ]

A. his house      

B. his garden      

C. his window

2. The Daguerrotype was ______. [ ]

A. a kind of picture   

B. a kind of camera   

C. a photographer

3. If a photographer wanted to take pictures of moving things in the year of 1840, he had to ______. [ ]

A. watch lots of films

B. buy an expensive camera

C. take lots of film and something else with him

4. Mathew Brady ______. [ ]

A. was very lifelike               

B. was famous for his unusual pictures

C. took many pictures of moving people

5. This passage tells us ______. [ ]

A. how photography was developed

B. how to take pictures in the world

C. how to use different cameras