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题目材料:

According to the passage, which is of the following is true about Haber nitrogen?
  • AHaber nitrogen is more effective at increasing the yield of wheat crops than that of maize or oat crops.
  • BUndesired effects can result from the application of surplus quantities of Haber nitrogen.
  • CHaber nitrogen was the first non-naturally occurring substance to be applied to crops as fertilizer.
  • DHaber nitrogen may not be effective if applied at an improper time in wheat`s growth cycle.
  • EFarmers were quick to adopt Haber nitrogen because it made their crops grow taller and thicker.

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