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发布时间: 1970-01-01

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1最佳选择题 3分

LeadPoisoning:ASilentEpidemicHowmuchleadisharmfulU

  • A. the amount of exposure was large.
  • B. it caused extreme symptoms of poisoning.
  • C. it caused symptoms whether serious or not.
  • D. poisoning had led to death among the poisone
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正确答案: -

本题解析: 暂无解析

2最佳选择题 3分

LeadPoisoning:ASilentEpidemicHowmuchleadisharmfulU

  • A. It tested first and second grade students from all over the United States.
  • B. All the students tested had lowerI. Q. and academic achievement than normal students.
  • C. None of the students with symptoms exceeded the safety level set in 1979 by CDC.
  • D. It proved the lead’ s high - level effects on people, especially on children.
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正确答案: -

本题解析: 暂无解析

3最佳选择题 3分

LeadPoisoning:ASilentEpidemicHowmuchleadisharmfulU

  • A. remove the source of pollution.
  • B. to get rid of the lead in the body with medicine.
  • C. stop drinking bottled water.
  • D. stop eating foods that contain lea
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正确答案: -

本题解析: 暂无解析

4最佳选择题 3分

LeadPoisoning:ASilentEpidemicHowmuchleadisharmfulU

  • A. children at 12 months of age.
  • B. children whose doctors advise them taking the test.
  • C. men at risk for high blood pressure.
  • D. women at risk for hypertension.
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正确答案: -

本题解析: 暂无解析

5最佳选择题 3分

LeadPoisoning:ASilentEpidemicHowmuchleadisharmfulU

  • A. intensified efforts to control the pollutant.
  • B. testing potential household sources of contamination.
  • C. having their blood tested for potential contamination.
  • D. intensified checkups for what they eat.
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正确答案: -

本题解析: 暂无解析

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