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nce /Reasons electricity cars television the inter cloning solar energy *without it ,without modern industry *make transportation easy and convenient. *provide entertainment and education *keep people wellinformed of the news… * Provides education and entertainment * easy way for people to municate with each other. * Help us find cures for disease * may help save rare animals * Clean and safe energy source, can help reduce pollution human being / mankind /man ? man: “人,人類” ,區(qū)別于其他動(dòng)物, 不用冠詞 ,也不加復(fù)數(shù) ,做主語(yǔ)謂語(yǔ)動(dòng)詞用 單數(shù) . 人定勝天 Man can conquer nature. ? mankind: “人,人類” ,不用冠詞 ,也 不加復(fù)數(shù) ,做主語(yǔ)謂語(yǔ)動(dòng)詞一般用 單數(shù) ,也可用 復(fù)數(shù) . ? the human: “人類”,做主語(yǔ)謂語(yǔ)動(dòng)詞用單數(shù) . ? human being: [C.] “人” mark n. 符號(hào);痕跡;分?jǐn)?shù) a question mark make a mark an ink mark full marks be marked with 標(biāo)著 …… ; (人、動(dòng)物等身上 )具有 mark examination papers Her face is marked with sadness. 她面露悲哀。 Vt. 做標(biāo)記;留痕跡于;批分?jǐn)?shù)