某陆地生态系统中,除分解者外,仅有甲、乙、丙、丁、戊5个种群,调查得知,该生态系统有4个营养级,营养级之间的能量传递效率为10%~20%,且每个种群只处于一个营养级.一年内输入各种群的能量数值如表所示,表中能量数值的单位相同.回答下列问题:
种群
甲
乙
丙
丁
戊
能量
3.56
12.80
10.30
0.48
226.50
阅读材料,回答问题。
材料一 “自1840年以来,中国人中就不断有人做着各种各样的西方梦,梦想有西方的坚船利炮,梦想有西方的新型工业,梦想有……”
材料二 我们革命的目的,是为中国谋幸福,因不愿少数满洲人专制,故要民族革命;
不愿君主一人专制,故要政治革命;不愿少数富人专制,故要社会革命。
材料三 “从此神州事事新,再无皇帝管人民。”
材料四 我们现在认定,只有“德先生”和“赛先生”(指民主和科学)可以救治中国政治上、道德上、学术上、思想上的一切黑暗。
My favourite sport
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