60歲以下:死亡警報 (2)
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背誦美文—— 黑猩猩
ChimpanzeeThe most striking single fact about chimpanzees is the flexibility of their social life, the lack of any rigid form of organization. It represents about as far a departure from the babo
背誦美文——植物學(xué)
BotanyBotany, the study of plants, occupies a peculiar position in the history of human knowledge.For many thousands of years it was the one field of awareness about which humans ...
晨讀美文027
晨讀美文It is well that young men should begin at the beginning and occupy the most subordinate positions. Many of the leading businessmen of Pittsburgh had a serious responsibility thrust upon...
晨讀美文021
晨讀美文There are two ways of thinking of history. There is, first, history regarded as a way of looking at other things, really the temporal aspect of anything, from the universe to this nib wit...