The passage is mainly about（）
A: the agriculture revolution
B: the invention of labor-saving machinery
C: the development of scientific agriculture
D: the farming machinery in America
A: the agriculture revolution
B: the invention of labor-saving machinery
C: the development of scientific agriculture
D: the farming machinery in America
举一反三
- What contributes most to the development of the US agriculture? A: highly mechanized farming operations B: favorable climate C: fertile soil D: scientific farming methods
- Holland is famous for its ______ products such as milk powder. A: machinery B: food C: dairy D: agriculture
- Which of the following statements is NOT true（） A: The need for labor helped the invention of machinery in America B: The farmer rejected Charles New bolt's plow for fear of ruin of their fields C: Both Europe and America had great need for farmer machinery D: It was in Indiana that the first chilled-steel plow was produced
- The invention of this new machinery will _________________ the coal industry.
- According to the passage, what was the first great step toward the practice of agriculture A: The invention of agricultural implements and machinery. B: The development of a system of names for plants. C: The discovery of grasses that could be harvested and replanted. D: The changing diets of early humans.