What can we infer from the passage?
A) Human can be totally replaced by machines in agriculture.
B) We cannot see mechanization in Africa,
C) As long as adaptations been made, mechanization will be used in agriculture in tropical area.
D) The number of farmers who run a farm in America is less then thai of the farmer who run a farm of under developed countries.
正确答案：D
答案：D
[试题分析]事实推断题
[详细解答]文章虽然指出机械化发展很快但并未提及人类将在农业生产中完全被替代所以A错误文章说机械化在非洲和拉丁美洲的许多地方还未使用但没有说那里完全没有机械农具最后一段则指出在热带地区实行机械化的问题很复杂需要仔细规划所以BC都很偏颇只有D正确这可以从第四段第二句得到验证
