A-A+
It is the author's view that in human civiliza
问题详情
It is the author"s view that in human civilization agriculture______.
A．is the most important step man has ever made
B．is only less important than the discovery of fire
C．had long been practiced since 3000B.C.
D．can be ranked in importance with the invention of machines
参考答案
正确答案：D
解析：本题通过仔细阅读第三段关于“农业”这一部分"Agriculture was a step in human progress to which subsequently there was nothing comparable until our own machine age"可以发现正确答案是D。
