What does the passage mainly discuss? [br] The word "it" in line 21 refers toA

游客2024-01-05 19

问题 What does the passage mainly discuss? [br] The word "it" in line 21 refers to

选项 A、biological productivity
B、oil
C、organic material
D、petroleum

答案 C

解析

转载请注明原文地址:https://tihaiku.com/zcyy/3334942.html

相关试题推荐

随机试题

最新回复(0)

Labelthediagrambelow.ChooseNOMORETHANTWOWORDSfromthepassageforeach