跌落谷底 10 Posted August 16, 2015 Report Share Posted August 16, 2015 1.請問為甚麼地下水面不是一條水平線??它跟河流是連在一起的嗎?2.為甚麼森林比草原更脆弱?森林倒下不是有機質一樣回歸土壤嗎?? Link to post Share on other sites
Guest Posted August 18, 2015 Report Share Posted August 18, 2015 要可以滲水的地層才會有地下水，地層不是水平的。 Link to post Share on other sites
a4047jerry 10 Posted November 16, 2015 Report Share Posted November 16, 2015 草原很快就可以再長回來，森林要花好幾十年 Link to post Share on other sites
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