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    (C) New findings from Queen’s University biologists show that in the plant world, bigger isn’t necessarily better. “Until now most of the thinking has suggested that to be a good competitor in the forest, you have to be a big plant, says Queen’s Biology professor Lonnie Aarssen. “But our research shows it’s virtually the other way around. Previous studies showed that larger plant species monopolize sunlight, water and other resources, limiting the number of smaller plant species that can exist around them. But the research has proved that this is not generally the case in natural vegetation. In the Queen’s project, PhD student Laura Keating targeted the largest “host plants of 16 woody plant species growing in the Okanogan Valley, British Columbia. The research team calculated the number and variety of plants that neighbored each large host plant. They then randomly selected plots without host plants and calculated the plant species there as well. The research showed that the massive trees have no effect on the number of species with which they coexist. Smaller plants have many advantages over their overbearing neighbors, Professor Aarssen notes. Larger species generate physical space niches under their shelters where smaller species grow well. Smaller plants are much more effective than large trees at using available resources. They also produce seeds at a much younger age and higher rate than their bigger counterparts, and settle down much more quickly-thus competing with the newly-born plants of larger species. 43. What’s the main idea of the text? A. Smaller plants may have many advantages over their neighbors. B. In the plant world, the bigger is better than the smaller one. C. To be a good competitor in the forest, you have to be a small plant. D. Queen’s University’s students made a new research. 44. The underlined word “this in Para. 3 refers to the view that . A. large and small plants can grow together in harmony B. larger plant species limit their smaller neighbors’ growth C. small plant species have their own advantages D. large and small plant species can never coexist 45. What can we learn according to the text? A. Larger plant species limit the number of smaller ones around them. B. Smaller plants can limit the number of plant species around them. C. Smaller plants produce seeds at a higher rate than their bigger counterparts. D. Larger trees are more effective than small plants at using available resources. 46. Which is the CORRECT order in the Queen’s project? a. Randomly selected plots without host plants and-calculated the plant species. b. Calculated the number and variety of plants that neighbored each large host plant. c. Selected the largest individuals or "host plants" of 16 woody plant species. A. a, b, c B. c, b, a C. b, c, a D. a, c, b 【查看更多】

     

    题目列表(包括答案和解析)

     With a lot of tough problems _______ , the pilot was still calm, cool and collective under pressure.

    ［2011北京高三检测］

    A．solve                      B．solved                     C．solving                   D．to solve

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    Peanuts to This

    Proudly reading my words，I glanced around the room，only to find my classmates bearing big smiles on their faces and tears in their eyes.Confused，I glanced toward my stone?faced teacher.Having no choice，I slowly raised the report I had slaved over，hoping to hide myself.“What could be causing everyone to act this way？”

    Quickly，I flashed back to the day Miss Lancelot gave me the task.This was the first real task I received in my new school.It seemed simple：go on the Internet and find information about a man named George Washington.Since my idea of history came from an ancient teacher in my home country，I had never heard of that name before.As I searched the name of this fellow，it became evident that there were two people bearing the same name who looked completely different！One invented hundreds of uses for peanuts，while the other led some sort of army across America.I stared at the screen，wondering which one my teacher meant.I called my grandfather for a golden piece of advice：flip(掷) a coin.Heads—the commander，and tails—the peanut guy.Ah！Tails，my report would be about the great man who invented peanut butter，George Washington Carver.

    Weeks later，standing before this unfriendly mass，I was totally lost.Oh well，I lowered the paper and sat down at my desk，burning to find out what I had done wrong.As a classmate began his report，it all became clear，“My report is on George Washington，the man who started the American Revolution.”The whole world became quiet！How could I know that she meant that George Washington?

    Obviously，my grade was awful.Heartbroken but fearless，I decided to turn this around.I talked to Miss Lancelot，but she insisted：No re?dos；no new grade.I felt that the punishment was not justified，and I believed I deserved a second chance.Consequently，I threw myself heartily into my work for the rest of the school year.Ten months later，that chance unfolded as I found myself sitting in the headmaster’s office with my grandfather，now having an entirely different conversation.I smiled and flashed back to the embarrassing moment at the beginning of the year as the headmaster informed me of my option to skip the sixth grade.Justice is sweet！????????????? ????????????? (2012·北京，B)

    1. What did the author’s classmates think about his report?

    A．Controversial.? B．Ridiculous.

    C．Boring.? D．Puzzling.

    2. Why was the author confused about the task?

    A．He was unfamiliar with American history.

    B．He followed the advice and flipped a coin.

    C．He forgot his teacher’s instruction.

    D．He was new at the school.

    3.The underlined word “burning” in Para.3 probably means “________”．

    A．annoyed? B．ashamed

    C．ready? D．eager

    4.In the end，the author turned things around ________.

    A．by redoing his task

    B．through his own efforts

    C．with the help of his grandfather

    D．under the guidance of his headmaster

     

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     All their attempts to rescue the child from the burning building were_________．He died soon afterwards．               [2011吉林高二检测]

    A．in place          B．in return

    C．in vain           D. for fear

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     Cao Cao’s tomb is reported ________ in China, which attracts nationwide attention．

    [2011漳州高二检测]

    A. being found                                          B. to be found

    C. having been found                                 D. to have been found

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    When deeply absorbed in work, ______ he often was，he would forget all about eating or sleeping.（2012北京卷）

    A. that                   B. which                 C. where                  D. when

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