原文
详解
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
题目详解
反馈

题型分类:否定事实信息题

原文定位:整个段落都在讨论这个内容,可直接通过选项定位。

选项分析:

B 选项,introduction of new crop 未提及。

A 选项,对应第三句,... increasing research was devoted to improving seeds, developing chemical fertilizers, and advancing livestock。

C 选项,对应最后一句,It also included mechanical cream separators and other food-processing devices that improved supply。

D 选项,对应倒数第三句,After 1861, with the development of land-grant universities in the United States that had huge agricultural programs, American crop-production research added to this mix。

收藏
讨论

上一题

Official 51 Passage 2

下一题

Official 50 Passage 1
发送
取消
发表评论
发送

  • 回复
  • 复制
  • 删除

取消