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1、 高二下学期英语期末考试试卷（附答案）一、阅读理解（共15小题；每小题2分，满分30分）（共4题；共30分）1.阅读理解 We produce 500 billion of plastic bags in a year worldwide and they are thrown away polluting oceans, killing wildlife and getting dumped in landfills where they take up to 1,000 years to decompose. Researchers have been unsuccessfully loo
2、king for a solution. The 16-year-old Canadian high school student, Daniel Burd, from Waterloo Collegiate Institute, has discovered a way to make plastic bags degrade(降解) in as few as 3 months, a finding that won him first prize at the Canada Wide Science Fair, a 10,000 prize, a 20,000 scholarship, a
3、nd a chance to revolutionize a major environmental issue. Burds strategy was simple: Since plastic does eventually degrade, it must be eaten by microorganisms(微生物)If those microorganisms could be identified, we could put them to work eating the plastic much faster than under normal conditions. With
4、this goal in mind, he grounded plastic bags into a powder and concocted(调制) a solution of household chemicals, yeast(酵母) and tap water to encourage microbes growthThen he added the plastic powder and let the microbes work their magic for 3 monthsFinally, he tested the resulting bacterial culture on
5、plastic bags, exposing one plastic sample to dead bacteria as a controlSure enough, the plastic exposed(暴露) to the live bacteria was 17% lighter than the control after six weeks. The inputs are cheap, maintaining the required temperature takes little energy because microbes produce heat as they work
6、, and the only outputs are water and tiny levels of carbon dioxide. “Almost every week I have to do chores and when I open the closet door, I have piles of plastic bags falling on top of meOne day, I got tired of it and I wanted to know what other people are doing with these plastic bagsThe answer:
7、not muchSo I decided to do something myself.” Said Daniel Burd.（1）Daniel Burd won first prize at the Canada-Wide Science Fair because _.A.he found a way to degrade plastics in shorter timeB.he contributed much to environmental protectionC.he found a new kind of microorganismD.he could encourage micr
8、obe growth in an easier way（2）Daniel Burd exposed one plastic sample to dead bacteria to _.A.make the live bacteria work betterB.know which bacteria worked fasterC.test how effective his method wasD.control the temperature in the process（3）Maintaining the required temperature takes little energy bec
9、ause _.A.plastics can get hot easilyB.microbes can produce heat themselvesC.much carbon dioxide is producedD.the temperature can be controlled（4）Daniel Burd got his idea from _.A.his school textbook B.the failure of researchersC.his everyday work D.the practice of other people2.阅读理解 For hours after
10、their boat sank, Ken Henderson and Coen trod(踏) water in the Gulf of Mexico, talking about life and death while struggling to survive. For more than 30 hours, it worked. Then Henderson was forced to make a decision. “Im going to go for help or youre not going to make it,” Henderson told Coen, just b
11、efore cutting the strap(带子) that connected them in the deep, cold waters. “I understand,”Coen responded, giving Henderson a last set of instructions, “Kiss my babies for me.” Days after the fishing trip ended in tragedy, Henderson told the story for The Associated Press. They had been fishing for a
12、few hours when suddenly Coen noticed the boat was filling with water. Henderson got both motors roaring, only to have the saltwater that had leaked in break them straight awayCoen jumped to the right, his sunglasses and cap flying off. The two grabbed extra life jackets and other floating items, inc
13、luding a half full bottle of Diet Coke. “The water was so cold and it took your breath away,” Henderson said. They immediately began to tremble. The pair prepared for a long wait. And they talked.“We discussed things and discussed life. We discussed families. We just tried to keep occupied,” Henders
14、on said. Eventually Coen started hallucinating(有幻觉). Henderson tried to keep Coens arms and legs moving. But as morning came, Coens situation worsened. And so Henderson decided to cut the strap. He swam for two hours, tired, frustrated and depressed. Then he saw an oil rig(钻探平台) in the distance. He
15、swam, seeing ice and crystal trees in the water. He reminded himself constantly there were no trees. His legs was so weak that he could barely lift them. Henderson slowly pulled himself up the rigs ladder. It was over 50 miles from where they had gone in the water. All he could think of was Coen. Convinced his friend would survive, he told the coast guard where they had parted. Two hours later, a fisherman found a body in a life jacket. Later, in the hospital, Henderson saw his friend. He apologized and asked for forgiveness. He promi
