问题 解答题

观察是科学探究的一种基本方法,观察时要全面、要细致、要思考.

把一株幼嫩的植物放在一个黑箱内,左侧开个小孔,有光透进,几天后观察植物茎的生长情况;把一株幼嫩的植物放在一个黑箱内,右侧开个小孔,有光透进,几天后观察植物茎的生长情况.从实验中你能得出什么结论?

答案

植物能对外界光的刺激做出反应,植物幼嫩的尖端受单侧光照射后产生的一种影响,能传到茎的伸长区引起弯曲.放在左侧开孔黑箱内的植物,光只从左侧照射植物,植物幼嫩的茎弯向左侧生长;放在右侧开孔黑箱内的植物,光只从右侧照射植物,幼嫩的茎弯向右侧生长,这说明植物的茎向光生长.

故答案为:植物的茎向光生长.

阅读理解

I wish there would be a way to describe China in simple terms but that’s impossible. For the most part Chinese people are friendly, easy-going and optimistic. They are curious and unusually patient and they are also the hardest-working people I have ever met.

In China, family is everything. In my English classes when the students were asked what they would do if they only had a few hours to live, most students told me how they would spend their last few hours with their families and parents. Many times the subjects in the classes center on families and friends. I teach many students a year, talking to them freely.

The cost of living here is very low compared with that of the US. The city of Xiang Fan I live in isn’t large and I live better. Non-imported(非出口的) foods are very cheap, so are clothing and articles of everyday use. The cost of public transportation is very low, too. Chinese value education. However, it is reported that many children can’t afford the expenses of schooling and are forced to leave school in some poor area in China. But they organized Project Hope many years age. It creates conditions for the poor children to go back to school. In my opinion, Project Hope is of great importance to the development of the rural education.

When we read news of China in the west, rarely, if ever, will we see anything mentioned of the positive changes China has gone through. While it is true that economic miracles have not reached many areas of China, but we also have the same problems.

When I am asked which country I consider better. China or the US, my answer has always been the same, “We are not worse or better than each other, we are only different.”

小题1:What does the author think of Chinese people?

A.He thinks most Chinese people hardly work.

B.He thinks most Chinese people are proud.

C.He praises most Chinese people a lot.

D.He dislikes most Chinese people.小题2:What is the author doing in China?

A.He is visiting the places of interest.

B.He is teaching English in a school.

C.He is studying in a college.

D.He is on business.小题3:What are not cheap in China in the author’s opinion?

A.Clothes and shoes made in China.

B.Local foods

C.Public transportation tickets.

D.Imported foods小题4:We can infer from the passage that the author thinks________.

A.the westerners have got to know China well

B.China’s economic miracles have appeared everywhere

C.the progress of China is seldom reported in the US

D.the education in rural areas is never cared about in China小题5:In the author’s eyes,________.

A.China is different from the US

B.China is better than the US

C.Americans are richer than Chinese

D.China bears great similarities to the US

单项选择题