Why is a “secondary succession” quicker、-最需题库

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1What conditions are needed for shrubs to become established、
A.Ferns must take root.
B.The ground must be covered with grass.
C.More soil must accumulate.
D.Smaller plants must die out.
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2In a “primary succession', what makes it possible for mosses to take root、
A.The type of rock.
B.The amount of sunlight.
C.The amount of moisture.
D.The effect of lichens.
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3What has sometimes caused plants to die out of the past、
A.Interference from foresters.
B.Variations in climate.
C.The absence of wooded lan
D.D.The introduction of new type of plants.
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4What does the forest strike mankind as permanent、
A.The trees are in community.
B.The forest is renewed each season.
C.Man's life is short in comparison.
D.It is an essential part our lives.
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5The writer would approve an unsuccessful political candidate ____.
A.gave up all his opportunities
B.promised to try again next time
C.overthrew the government by force
D.told the people the truth about his opponent
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6Which of the following would be the best title for the passage、
A.Grandma Moses: A Biographical Sketch
B.The Children of Grandma Moses
C.Grandma Moses: Her Best Exhibition
D.Grandma Moses and Other Older Artists
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7According to the passage, Grandma Moses began to paint because she wanted to ____. 
A.decorate her home
B.keep active
C.improve her salary 
D.gain an international reputation
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8From Grandma Moses' description of herself in the first paragraph, it can be inferred that she was ____.
A.independent
B.pretty
C.wealthy
D.timid
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9Grandma Moses spent most of her life ____.
A.nursing
B.painting
C.embroidering
D.farming
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10In line 14, the word “spotted” could best be replaced by ____.
A.speckled
B.featured
C.noticed
D.damaged
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