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第二十八篇

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发布时间: 2016-08-25

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1共用题干单选题 3分

Howmanydiseasesareknowntoattackwheat?

  • A. Around 30,p00
  • B. Around 140
  • C. Around 29,960
  • D. Around 40
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正确答案: -

本题解析: 暂无解析

2共用题干单选题 3分

Accordingtothispassagewhichofthefollowingwouldapla

  • A. A world war
  • B. Border conflicts
  • C. Rations of grain and meat
  • D. Social upheavals
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正确答案: -

本题解析: 暂无解析

3共用题干单选题 3分

Whatisthemainideaofthesecondparagraph?

  • A. Some plants have relative immunity to a great many diseaseswhile others have a susceptibility to them
  • B. The tolerance of a particular plant changes as the growing conditions change
  • C. A blight killed virtually every chestnut tree in North America
  • D. A blight may be a national infection
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正确答案: -

本题解析: 暂无解析

4共用题干单选题 3分

Accordingtothepassagesomeplantdiseasescanbeprevent

  • A. killing parasites
  • B. inoculation
  • C. killing insects
  • D. improving growing conditions
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正确答案: -

本题解析: 暂无解析

5共用题干单选题 3分

Whichofthefollowingstatementsisnottrue?

  • A. Some plant diseases may be caused by bacteria
  • B. Some plant diseases may be caused by pathogens
  • C. Some plant diseases may be caused by fungus
  • D. Symptoms are always helpful in identifying diseases
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正确答案: -

本题解析: 暂无解析

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