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If we say the four great inventions (Gunpowder,Compass,Paper and Art of Printing) reflected ancient China’s scientific achievements,then Zhaozhou Stone Bridge perfectly represented one of the greatest contributions to ancient China’s bridge building.Nobody was unfamiliar with the stone bridge full of legends and vivid folk stories.
The ancient Zhaozhou stone bridge started to be built in 590 during the Sui Dynasty (581~618) and established in 608.The pioneer for building the bridge was Li Chun who overcame unimaginable difficulties,undergoing all hardships.The location of the bridge is in Zhao County south,Hebei Province.It lay across the Xiaoshui River,far away from the mountains that provided rocky materials.In ancient times,it was such a busy,deep and wide river that could be used as an important carriage to transport heavy rocks and other materials.As we know,no train,no lifting machine could be used to move granite(花岗岩)blocks to the construction site.As an intelligent stonemason and engineer,Li Chun worked out his plan and design all from his own direct observation and investigation.It took his whole life-time in completing the great historical project inChina.Nowadays it is not only a historical remarkable model of architecture,but also a brilliant Chinese cultural crystallization(结晶) of wisdom.
The entire length of the bridge is 50.82 meters with 10 meters width.The whole stone bridge looks like a big bow,the span of which is 37.02 meters,and its height from the top to the surface of water at a regular position is 7.23 meters.The bridge arch seems to be moving smoothly and flatly.The whole arch consists of 28 big granite blocks connected each other tightly together.On both end sides of the general arch there are 4 smaller arches,2 of which on one side,the other 2 on the other side.The smaller arches could be used to decrease the weight of the bridge and save stone materials,and help flood get through easily,which seems to be much prettier.Such a hard-thinking and careful consideration of the engineering article is really a model of design and layout.The span was much wider than the other stone bridge in ancient times all over China.
Today Zhaozhou Stone Bridge is one of international cultural relics and perfectly protected and preserved by the concerned administration of China.
1.The best title of this passage is _________.
A.Great engineer in ancient China B.Zhaozhou stone bridge
C.Four great inventions D.How to build a bridge
2.The third paragraph mainly tells us _________.
A.the materials of Zhaozhou bridge B.the structure of Zhaozhou bridge
C.the arches of Zhaozhou bridge D.the importance of Zhaozhou bridge
3.The underlined word “carriage” probably refers to _________.
A.cart B.transport C.channel D.resourse
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—People should stop using their cars and start using public transport.?
— .The roads are too crowded as it is.?
A.All right B.Exactly C.Go ahead D.Fine ?
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根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两处为多余选项。
Active & Passive TransportRecall that all living things are made up of tiny units called cells, and that -cells are surrounded by a covering called a membrane (膜).The membrane allows things to move in and out of the cell, and it also controls what can get through. 1 They must have water, oxygen, sugar, sodium, potassium (钾) , and a variety of other minerals.The body has to have a delivery system to get these materials where they need to go.In addition, every cell produces waste materials that it needs to get rid of. 2
Just like cars, trucks, and other vehicles form a transport system for the pick up and delivery of materials out in the world, the body has a transport system, too. 3
Passive transport is easiest for the cells because they don't need to use any energy to make it happen.Diffusion (扩散) is the simplest and most common form of passive transport.
During the diffusion process, tiny particles (微粒) of the materials that need to be delivered to the cells are spread through either a gas (like oxygen) or a liquid (like water). 4 Osmosis (渗透作用) is a unique form of passive transport that allows water to pass through the cell membrane, but keeps most other materials out.
Active transport is used when the concentration of materials inside the cell is high, and the cell needs to push materials out to areas of low concentration of the materials.Unfortunately, this kind of transport requires the cell to work against the natural direction of diffusion, so the cell uses up energy. 5 They pump sodium out of their cells and pull potassium in.Although they must use energy in this process, doing so allows them to thrive (成长).
A.Areas with high concentrations of the materials slowly diffuse them to areas of low concentration.
B.Cells need many kinds of materials in order to survive.
C.One example of this is the way that nerve cells work.
D.There are two kinds of transport:active transport, and passive transport.
E.Passive transport is much more essential than active transport.
F.The body has to have a method of waste collection and disposal.
G.Then the cell usually needs extra energy to make up for it.
【2011·贵州遵义七校联考】A
O. Henry was a pen name used by an American writer of short stories. His real name was William Sydney Porter. He was born in North Carolina in 1862. As a young boy he lived an exciting life. He did not go to school for very long, but he managed to teach himself everything he needed to know. When he was about 20 years old, O. Henry went to Texas, where he tried different jobs. He first worked on a newspaper, and then had a job in a bank. When some money went missing from the bank, O. Henry was believed to have stolen it. Because of that, he was sent to prison. During the three years in prison, he learned to write short stories. After he got out of prison, he went to New York and continued writing. He wrote mostly about New York and the life of the poor there. People liked his stories, because simple as the tales were, they would finish with a sudden change at the end, to the readers’ surprise.
41. In which order did O. Henry do the following things?
a. Lived in New York.
b. Worked in a bank.
c. Traveled to Texas.
d. Was put in prison.
e. Had a newspaper job.
f. Learned to write stories.
A. e, c, f, b, d, a B. c, b, e, d, a, f
C. e, b, d, c, a, f D. c, e, b, d, f, a
42. People enjoyed reading O. Henry’s stories because _____.
A. they had surprise endings B. they were easy to understand
C. they showed his love for the poor D. they were about New York City
43. What do we know about O. Henry before he began writing?
A. He was well-educated.
B. He was very good at learning.
C. He was devoted to the poor.
D. He was not serious about his work.
44. Where did O. Henry get most material for his short stories?
A. His life inside the prison. B. The newspaper articles he wrote.
C. The city and people of New York. D. His exciting early life as a boy.
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