高中英语阅读理解科技类三

1、高中英语阅读理解科技类三Imagine , one day , getting out of bed in Beijing and being at your office in Shanghai in only a couple of hours , and then , after a full day of work , going back home to Beijing and having dinner there .Sounds unusual , doesnt it? But its not that unrealistic , with the development of

2、China shigh speed railway system . And that s not a11 . China has an even greater high speed railway plan - to connect the country with Southeast Asia, and eventually Eastern Europe .China is negotiating to extend its own high -speed railway network to up to 17 countries in 1 0 to 15 years , eventua

3、lly reaching London and Singapore .China has proposed three such projects. The first would possibly connect Kunming withSingapore via Vietnam and Malaysia . Another could start in Urumqi and go through Kazakhstanand Uzbekistan , and possibly to Germany.The third would start in the northeast and go n

4、orththrough Russia and then into Western EuropeIf China splan for the high -speedrailway goes forward , people could zip over fromLondon to Beijing in under two daysThe new system would still follow Chinaspeedhighway-standard. And the trainsrailway plan?可编辑,almost as fast as some airplanesBut the ke

5、y issue is really moneywould be able to go 346 kilometers an hourChina s bullet train（高ilthene connecting Wuhan to Guangzhou , already has theWorld s fastest average speed It covers 1,069 kilometers in about three hours.Of course , there are some technical challenges to overcome. There are so many i

6、ssues that need to be settled , such as safety , rail gauge（ 轨品巨）， maintenance of railway tracks .So, it s important to pay attention to every detailChina is already spending hundreds of billions of yuan on domestic railway expansionChina prefers that the other countries pay in natural resources rat

7、her than with capital investment . Resources from those countries could stream into China to sustain developmentIt 11 be a win -win project. For other countries , the railway network will definitely create more opportunities for business , tourism and so on , not to mention the better communication

8、among those countries .For China , such a project would not only connect it with the rest of Asia and bring somemuch-needed resources , but would also help develop China sWar woessee that in thecoming decades , millions of people will migrate to the western regions, where the land is emptyand resour

9、ces unused . With high-speed trains , people will set up factories and business centers in the west once and for a11 . And they 11 trade with Central Asian and Eastern European countries .67 . China s new high-speed railway plan will be a win-win project becauseA. China will get much-needed resource

10、s and develop its western regionsB. China and the countries involved will benefit from the project in various waysC. China will develop its railway system and communication with other countriesD. the foreign countriesinvolved will develop their railway transportation, business andtourism68 . Accordi

11、ngtothe passage , thegreatest challenge to the new high-speed railway planistechnical issuesB. safety of the systemC.financial problemsD. maintenance of railway tracks69 . Which ofthefollowing wordsbest describes the author attitudetowards China high-speedA. CriticalB. ReservedC. DoubtfulD. Positive

12、70 . Which of the following might be the best title for the passage? A . New Railway Standards B. Big Railway Dreams C. High speed Bullet Trains D . International Railway NetworkBHave you ever noticed the color of the water in a river or stream after a heavy rainfall? What do you think caused this c

13、hange in color? It is soil that has been washed into the river from the riverbank or from the nearby fields .Components of SoftSoil is made up of a number of layers（层）,each havingits own distinctive color andtexture . The upper layer is known as the litter . It acts like a blanket,limitingtemperatur

14、echanges and reducing water loss . The topsoil layer is made up of small particles of rock mixed with rotten plant and animal matter called humus（腐殖质）,which is black and gives the topsoilits dark color . This layer is usually rich in nutrients , oxygen , and water . Below the topsoil is the subsoil

15、, a layer that contains more stones mixed with only small amounts of organic matter. Thislayer is lighter in colour because of the lack of humus. Beneath the soil lies a layer of bedrock .Soil forms from the bottom up . Over time bedrock is attacked by rain, wind, frost, andsnow . It is gradually br

16、oken down into smaller particles in a process called weathering. Plantsbegin to grow , and rotten materials enrich the topsoil . Most of the soil in Eastern Canada, for example, was formed from weathered rock that was exposed when the ice disappeared l2, 000 years ago .Water Beneath the SoilOnce in

17、theSurface water collects and flows above the ground in lakes, ponds, and riverssoil or rock , it is called groundwater . Gravity pulls groundwater through the soil in a processcalled percolation（ 渗透）.Eventually the water reaches a layer called the water table. Under thisis bedrock through which wat

18、er cannot percolate.As water percolates downward , it dissolves organic matter and minerals from the soil and carries them to deeper layers . This causes a serious problem because plants require these nutrients for growth.Soil pHSoil can be acidic, neutral, or basic . The pH of the soil is determine

19、d by the nature of therockfrom which it was formed, and by the nature of the plants that grow and rot in it.The acidity of rain and snow can lower the pH of the groundwater that enters the soil. Byburning fossil fuels such as coal , oil and gasoline , humans have been contributing to higher levels o

20、f acidity in many soils . When fossil fuels are burned, gases are released into the air and then fall back to earth as acid rain . Acid soil increases the problem of carrying nutrients to lower soil levels . As nutrients are removed , soil is less fertile . Plants grow more slowly in acidic soil , a

21、nd also become easily attacked by diseases .67 . The layer of soil that provides necessary nutrients for plant growth is called.A. litter B. topsoil C. humus D . subsoil68 . According to the text . which of the following is NOT true?A . Soil forms from weathered rock on the earth surface.B. The deeper layer o