Not until the late nineteenth and early twentieth centuries______as a unified sc

游客2024-01-05 39

问题 Not until the late nineteenth and early twentieth centuries______as a unified science.

选项 A、did ecology emerge
B、when ecology emerged
C、ecology emerged
D、when did ecology emerge

答案 A

解析

转载请注明原文地址:https://tihaiku.com/zcyy/3335526.html

相关试题推荐

随机试题

最新回复(0)

WilliamGilbertandMagnetismA16thand17thcenturiessaw