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- 動詞的時態(tài)
美國天然氣勘探呈現(xiàn)新面貌(1)
礦物燃料是由動植物的遺體經(jīng)過數(shù)百萬年腐化而來的。Hints:methane "proved reserves" the Appalachian Mountains MichiganMany people think the search for cleaner energy leads only to renewable resources...
19世紀(jì)美國社會的變遷(1)
19世紀(jì)的美國就如我們現(xiàn)在所講的第三世界國家,它是如何發(fā)展成第一強(qiáng)國的呢?The book opens in 1815, and Howe says the United States was what we would call today a Third World country. "That is most p...
洛杉磯的博物館(3)
洛杉磯博物館的歷史見證這座城市的發(fā)展As police radioed for reinforcements, the bank robbers fired some 1,200 rounds ammunition in a ferocious shootout caught by television news cameras. Ten office...
美國的科技下鄉(xiāng)(1)
總是說要帶科技下鄉(xiāng),把科學(xué)知識普及到廣大農(nóng)民手中,看看美國的科技下鄉(xiāng)是如何做的?Looking for some reading material about farming? One place to look is the science magazine of the United States Dep...