题目内容

 Green products are becoming more and more popular because they are environmentally ________.

  A. friendly       B. various'        C. common        D. changeable

解析:

A。environmentally friendly有利于环境的,环保的

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      I was the middle child of three, but there was a gap of five years on either side, and I hardly saw my father before I was eight. For this and other reasons I was somewhat lonely. I had the only child’s habit of making up stories and holding conversations with imaginary persons, and I think from the very start my literary ambitions(文学志向) were mixed up with the feeling of being isolated(孤独) and undervalued. I knew that I had a natural ability with words and a power of facing unpleasant facts, and I felt that this created a sort of private world in which I could get my own back for my failure in everyday life.
    However, the quantity of serious writing which I produced all through my childhood would not add up to half a dozen pages. I wrote my first poem at the age of four or five, my mother taking it down to dictation. I cannot remember anything about it except that it was about a tiger and the tiger had “chair-like teeth” - a good enough expression. At eleven, when the war of 1914-18 broke out, I wrote a poem which was printed in the local(地方的) newspaper, as was another, two years later, on the death of Kitchener. From time to time, when I was a bit older, I wrote bad and usually unfinished “nature poems”. I also, about twice, attempted a short story which was a failure. That was the total of the would-be serious work that I actually set down on paper during all those years.

56.The underlined word “it” in paragraph 2 refers to        .

A. the quantity of serious writing

B. the writer’s first poem

C. the writer’s childhood

D. the tiger in the poem

57. From the text, we learn that as a little boy the writer         .

A. had no playmates

B. showed his gift for writing

C. put out lots of poems and stories

D. got his first poem published in 1916

58. What can be inferred about the writer?

A. He was least favored in his family.

B. He had much difficulty in talking with others.

C. He had an unhappy childhood for lack of care.

D. His loneliness resulted in his interest in writing.

 

 

  As skies are filled with millions of migrating(迁徙) birds, European scientists say the seasonal wonder appears to be strange: The fatter the bird, tile better it flies.

    The results of their study led to a theory opposite to a central one of aerodynamics (空气动力学), which says that the power needed to fly increases with weight.

    For birds, obviously, the cost of flying with heavy fat is much smaller than we used to think. Researchers found that red knot wading birds double their normal body weight of 100 grams before making their twice-a-year nonstop flight between the British Isles and the Russian Arctic. Distance: 5,000 kilometers.

    Another study in the magazine Nature measured the advantage of flying in an aerodynamic group which allows birds to save energy by flying smoothly and quietly in the lead bird' s air stream.

    Flying in groups, their heart rates were 14.5 percent lower than flying alone, according to Henri, a French scientist. The findings help explain how birds complete difficult migrations. Researchers had thought that thinner, stronger birds would have the best chance to survive.

    The first study suggests that building up fat to be burnt as fuel during the migration is worth more than the energy it takes to carry the additional weight.

    In the study, researchers said their team studied the birds flown at different body weights during 28 simulated(模拟的) flights. They forced a small amount of special water into the birds' bodies so that they could measure the amount of energy burnt during the flight.

60. A red knot wading bird of 100 grams will probably weigh ________ before making its nonstop migrating flight.

  A. 50 grams    B. 100 grams       C. 150 grams       D. 200 grams

61. During their migrating flight, red knot wading birds can save energy by flying

  A. separately   B. alone           C. in groups        D. in pairs

62. A ________ red knot wading bird has a better chance to survive during its migrating flight.

  A. stronger     B. weaker         C. thinner          D. fatter

63. The best title for this passage may probably be ________.

Birds Thin Down For Journey

Birds Fatten Up For Journey

How Birds Build Up Fat For Journey

How Birds Burn Energy For Journey

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