Electric cars will not be really much cleaner than autos powered by mineral fuels until they rely less on electricity produced from usual coal-fired power plants.

 “For electric vehicles to become a major green alternative, the power fuel has to move away from

coal, or cleaner coal technologies have to be developed,” said Jared Cohon, the chairman of a National

Research Council report released on Monday. About half of US power is produced by

burning coal, which gives off many times more of traditional pollutants than natural gas, and about

twice as much of the main greenhouse gas carbon dioxide. Nuclear and renewable power have to

generate a larger portion of US power for electric cars to become much greener compared to

gasoline-powered cars, Cohan, who is president of Carnegie Mellon University, said in an interview.

Advances in coal burning, like capturing carbon at power plants for permanent burial underground,

could also help electric cars become a cleaner alternative to vehicles powered by fossil fuels, he said.

Pollution from energy sources did $120 billion worth of damage to human health, agriculture and

recreation in 2008, and electricity was responsible for more than half of the damage, said the NRC

report.

  Electric cars have their benefits such as reducing imports of foreign oil. But they also have hidden

costs. Materials in electric car batteries are hard to produce, which adds to the energy it takes to make

them. In fact, the health and environmental costs of making electric cars can be 20 percent greater

than usual cars, the report said.

  The report estimated that electric cars could still cost more than gas-powered cars to operate and

manufacture in 2030 unless US power production becomes cleaner.

1. Why are electric cars not clean enough?

   A. Because they run too slowly              B. Because they are too expensive

   C. Because they rely on coal-fired power.      D. Because they give off more carbon dioxide.

2. We can infer from the passage that ______.

   A. electric cars will soon take the place of gas-powered cars

   B. no one holds hope for electric cars at present

   C. electric cars waste more energy than before

   D. some people believe that electric cars are cleaner

3. The underlined word “them” refers to “______”.

   A. electric cars     B. batteries       C. producers        D. materials

4. Which of the following is NOT mentioned as a way to make electric cars cleaner?

   A. Developing cleaner coal technologies.        B. Making electric cars run faster.

   C. Generating more unclear power.             D. Making advances in coal burning.

第三节 完型填空(共20小题;每小题1.5分,满分30分)

阅读下面短文,掌握其大意,然后从36-55各题所给的四个选项(A、B、C和D)中,选出最佳选项。

Wings of Angel

     I used to hate myself because I wasn't "normal". Everyone else could play on the monkey bars and ride on a bicycle, but not   21  . I had a severe spinal cord disorder(脊髓病) and I knew I would always be much   22  than others.

    I hated going to school and I hated  people  23   at me. I hated seeing others smiling broadly and standing   24  and tall. And most of all, I hated looking in the   25  and seeing an ugly and hunchback(驼背).

    My friends found me  26  because I didn't let others get close to me. I thought I was going to go on like this for the rest of my life   27  Angela appeared.

    That afternoon, I was sitting by myself in a corner of the school——a spot where no one would

  28  me. That's when I first heard her voice.

    "Hi. Can I sit down?"

     I raised my head and there she was, with an irresistible smile on her round face.

     "What are you looking at?" she asked.

     "Ants."

     "What are they doing?"

      "No   29  ."

     "I bet they're playing games and make friends. Don't you think so?"

     That was how our   30  started and it didn't stop. We talked about everything under the sun-the ants, the clouds, my little niche(处境)-until it was sunset.

Then suddenly, she saw my   31 . She just stared.

My heart   32 . What I feared most had happened and I knew for sure she would   33   me now.

She stood up, pointed at my back and said, "I know  34 your back is hunched."

   I closed my eyes like a criminal waiting to be   35  . I begged in my heart for her to   36  , but she just kept on going. "I know what you've got in there. Do you?"

   "No," I answered   37 .

   She bent and whispered in my ears.

   "Your back is hunched because you've got a pair of wings from the angels."

   I was   38 . I looked into her eyes and her   39  touched my heart. From that day on, I started to learn to   40  myself because I have the wings of an angel and a kind - hearted friend.

21.A. her       B.it          C.me        D. them

22.A. slower    B.shorter     C.weaker    D. sadder

23.A. glaring    B. smiling     C.aiming       D. looking

24.A.together     B.alone     C.straight      D. still 

25.A. mirror     B.sun       C.corner      D. street

26.A. unfortunate    B.stubborn   C.hopeless     D. distant

27.A.until       B.before     C.since        D. after

28.A.ignore     B.seek       C.interrupt      D. disturb 

29.A.action     B.idea       C.sign           D. wonder 

30.A.comprehension   B.competition  C.conversation   D. connection 

31.A. shoulders      B.back        C.eyes         D. face

32.A.ached         B.beat         C.broke         D. sank 

33.A.put up with     B.rely on      C.look down upon     D. care for  

34.A.why          B.how         C.whether       D. that 

35.A.sentenced      B.arrested      C.punished      D. accused 

36.A.pause        B.leave         C.stop           D. relax 

37.A. firmly        B.weakly       C.proudly        D. shyly

38.A.amused       B.ashamed      C.annoyed       D. astonished

39.A. kindness     B.generosity    C.honesty        D. wisdom

40.A.enjoy         B.like          C.comfort        D. control

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网