Passage 2
Questions 6 to 10 are based on the following passage:
When aluminum was first produced about a hundred and fifty years ago, it was so difficult to separate form the ores in which it was found that its price was higher than that of gold. The price remained high until a new process was discovered for refining the metal with the aid of electricity approximately three quarters of a century later. The new method was so much cheaper that aluminum because practical for many purposes, one of which was making pots and pans.
Aluminum is lightweight, rustproof and easily shaped into different forms. By mixing it with other metals, scientists have been able to produce a variety of alloys, some of which have the strength of steel but weigh only one third as much.
Today, the uses of aluminum are innumerable. Perhaps its most important use is in transportation. Aluminum is found in the engine of automobiles, in the hulls of boats. It is also used in many parts of airplanes. In fact, the huge “airbus” planes would probably never have been produced if aluminum did not exist. By making vehicles lighter in weight aluminum has greatly reduced the amount of fuel needed to move them, Aluminum is also being used extensively in the building industry in some countries.
Since aluminum is such a versatile (多用的) metal, it is fortunate that bauxite (鋁土礦), which is one of its chief sources, is also one of the earth’s most plentiful substances. As the source of aluminum is almost inexhaustible, we can expect that more and more uses will be found for this versatile metal.
6. The price of aluminum was sharply reduced when people discovered a new refining process with the aid of .
A. wind B. solar energy C. hydraulic power D. electricity
7. Aluminum is .
A. lightweight, rustproof but not easily shaped into different forms
B. heavyweight, rustproof and easily shaped into different forms
C. lightweight, rustproof and easily shaped into different forms
D. lightweight and easily shaped into different forms but it is easy to become rusty
8. Which of the following is NOT true?
A. Aluminum is widely used in transportation.
B. Aluminum is also used in many parts of airplanes.
C. Aluminum is being used extensively in the building industry.
D. Aluminum is not used in its pure form.
9. Aluminum is found on earth mostly in the form of .
A. pure metal B. bauxite C. gold D. liquid
10. What is the passage talking about?
A. The features of aluminum and its functions. B. The process of aluminum.
C. The discovery of aluminum. D. The promising future of aluminum.
DCDBA
暫無解析
Paragraphs2and3explain________.
翻譯：
最近，一些地方大學(xué)開始將方言列為某些學(xué)生的必修課程，學(xué)生們要學(xué)習(xí)當(dāng)?shù)胤窖裕缓蟊辉u分以作為畢業(yè)的依據(jù)之一。一方面，支持此種做法的人認(rèn)為，將方言列為必修課可防止其消失，從而使當(dāng)?shù)貍鹘y(tǒng)文化和文化多樣性得以弘揚，同時城市獨特的個性得以保留。另一方面，反對此種做法的人爭論說，當(dāng)?shù)貙W(xué)生與外地學(xué)生相比有很多絕對優(yōu)勢，因此將方言列為必修課會引起教育不公平的問題。而且，將方言列為必修課程還會引起一些其他問題，如教材使用、師資問題和考試標(biāo)準(zhǔn)等。在我看來，方言作為傳統(tǒng)文化不可缺少的一部分和一種交流工具，可以讓學(xué)生自愿學(xué)習(xí)和使用，而不是強制完成。
翻譯：
中國位于亞洲東部，是世界上人口最多的國家。中國是世界四大文明古國之一，擁有大量的中華文化光輝的古跡，此外，中國地大物博，擁有茂密的森林、雄偉壯麗的瀑布、秀麗的湖泊以及如利劍直插云霄的山峰，所有這些都令世界各國人民神往。但是，更重要的是，中國以擁有五千多年的歷史而自豪，遺留下無數(shù)的歷史文物，其中包括珍貴珠寶、古跡名勝、宮殿及數(shù)不盡的雄偉建筑，令人驚嘆不已。這種種原因都促使中國成為許多人夢寐以求的旅游勝地。
Whichfactorpusheduphouseprices?
Passage2
Questions6to10arebasedonthefollowingpassage:
Thefoodweeatseemstohaveprofoundeffectsonourhealth.Althoughsciencehasmadeenormousstepsinmakingfoodmorefittoeat,ithas,atthesametime,mademanyfoodsunfittoeat.Someresearchhasshowntat40percentofcancerisrelatedtothedietaswell,especiallycancerofthecolon.Differentculturesatemorepronetogetcertainillnessesbecauseofthefoodthatischaracteristicinthesecultures.Thatfoodisrelatedtoillnessisnotanewdiscovery.In1945,governmentresearchersrealizedthatnitratesandnitrites,commonlyusedtopreservecolorinmeats,andotherfoodadditives,causedcancer.Yetthesecarcinogenicadditivesremaininourfood,anditbecomesmoredifficultallthetimetoknowwhichthingsonthepackaginglabelsofprocessedfoodarehelpfulorharmful.Theadditivesthatweeatarenotallsodirect.Farmersoftengivepenicillintobeefandpoultry,andbecauseofthis,penicillinhasbeenfoundinthemilkoftreatedcows.Sometimessimilardrugsareadministeredtoanimalsnotformedicinalpurposes,butforfinancialreasons.Thefarmersaresimplytryingtofattentheanimalsinordertoobtainahigherpriceonthemarket.AlthoughtheFoodandDrugAdministration(FDA)hastriedrepeatedlytocontroltheseprocedures,thepracticescontinue.
6.Howhassciencedoneadisservicetomankind?
A.Becauseofscience,mostofthefoodsweeattodayarecontaminated.
B.Ithascausedalackofinformationconcerningthevalueoffood.
C.Asaresultofscientificintervention,somepotentiallyharmfulsubstanceshasbeenaddedtoourfood.
D.Thescientistshavepreservedthecolorofmeats,butnotofvegetables.
7.Whatarenitratesusedfor?
A.Theypreservesflavorinpackagedfoods.
B.Theypreservethecolorofmeats.
C.Theyaretheobjectsofresearch.
D.Theycausetheanimalstobecomefatter.
8.TheFDAhastriedrepeatedlytocontrol.
A.theattempttofattentheanimals
B.theattempttocuresickanimals
C.theusingofdrugstoanimals
D.theusingofadditivestopreservethedoloroffood
9.Theword“carcinogenic”meansmostnearlythesameas.
A.trouble-makingB.color-retaining
C.money-savingD.cancer-causing
10.WhichofthefollowingstatementsisNOTtrue?
A.Drugsarealwaysgiventoanimalsformedicalreasons.
B.Someoftheadditivesinourfoodareaddedtothefooditselfandsomearegiventothelivinganimals.
C.Researchershaveknownaboutthepotentialhazardsofthefoodadditivesforoverthirty-fiveyears.
D.Foodmaycausefortypercentofcancerintheworld.
