Correct: Organic coming from living things, Soil: is a mixture of bits of rock and bits of once-living parts of plants and animals., Soil started from rocks , Incorrect: Organic coming from non-living substance , rocks started from soil , Soil is not important for life ,

Define soil

由
列印
嵌入

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?