Which of the following statements is NOT considered a characteristic of farming in the late 18th and early 19th centuries?（）A、Use of artificial fertilizer.B、Introduction of new agricultural machinery.C、The'Open-field'system.D、A system of crop rotation.
题目
Which of the following statements is NOT considered a characteristic of farming in the late 18th and early 19th centuries?（）
- A、Use of artificial fertilizer.
- B、Introduction of new agricultural machinery.
- C、The'Open-field'system.
- D、A system of crop rotation.
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参考答案和解析
正确答案:C