The main idea of the first paragraph is ______. [br] Plants with roots appeared

游客2025-03-17 58

问题 The main idea of the first paragraph is ______. [br] Plants with roots appeared about ______ million years ago.

选项 A、430
B、300
C、330
D、100

答案 D

解析 By the end of100 million years，plants had developed their roots(到了1亿年前的后牛段，植物已经形成了它们的根)从以上这句话可以看出，本题的正确答案应该是D.

转载请注明原文地址:http://tihaiku.com/zcyy/4000834.html

相关试题推荐

随机试题

最新回复(0)

Withoutheatandsunlight,plantsontheearth______well.A、wouldnotgrowB、wi