问题
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Some plants are so sensitive _____ pollution that
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The phrase "sensitive skins" (Para. 2) most probably means________.A.skins that are quick
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The various pumps and lines are _____ to some extent so that each pump can act as an alter
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To reduce the pollution, some industries are now______.A.treating the waste water containi
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Such problems______air pollution and traffic jams are becoming more and more serious in so
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The phrase "sensitive skins"(Para. 2)most probably means______.A.skins that are sticky or