It can be inferred from the passage that terra-cotta had which of the following advantages”
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Which of the following is NOT mentioned in paragraph 1 as resulting from rapid ecological change?
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A.He needs the woman's help.
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The word "vast" in line 10 is closest in meaning to
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George Washington Carver ______ international fame for revolutionizing agriculture research in the southern United States during the early twentieth century.
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A.Leave her garbage cans at his house.
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Why are marine organisms good candidates for fossilization?
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A.He plans to sing a song at the audition
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According to the passage, agricultural societies produced larger human populations because agriculture
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听力原文: Human population near the equator have e...
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