【文章內(nèi)容簡介】 ? 瀕危動物具有絕對性和相對性。絕對性是指瀕危動物在相當長的一個時期內(nèi)野生種群數(shù)量較少，存在滅絕的危險。相對性是指某些瀕危動物野生種群的絕對數(shù)量并不太少，但相對于同一類別的其他動物物種來說卻很少；或者某些瀕危動物雖然在局部地區(qū)的野生種群數(shù)量很多，但在整個分布區(qū)內(nèi)的野生種群數(shù)量卻很少。 我國是瀕危動物分布大國。據(jù)不完全統(tǒng)計，僅列入 《 瀕危野生動植物種國際貿(mào)易公約 》 附錄的原產(chǎn)于中國的瀕危動物有 120多種 (指原產(chǎn)地在中國的物種 )，列入 《 國家重點保護野生動物名錄 》的有 257種，列入 《 中國瀕危動物紅皮書 》 的鳥類、兩棲爬行類和魚類有 400種， 我國有多少種瀕危動物 ? 列入各省、自治區(qū)、直轄市重點保護野生動物名錄的還有成百上千種。隨著經(jīng)濟的持續(xù)快速發(fā)展和生態(tài)環(huán)境的日益惡化，我國的瀕危動物種類還會增加。 改革開放以來，我國進口了不少動物，如灣鱷、暹羅鱷、食蟹猴、黑猩猩、非洲象等。至于我國究竟有多少種瀕危動物很難說清。但可以肯定，如果包括無脊椎動物的話，至少有 1000種。 Unit 15 Section B Words amp。 Expressions recycle built stuff pull glue roof discard tile 再循環(huán)；回收利用 build的過去式和過去分詞 原料；材料 拉；拖；拔 膠合；粘貼膠水 頂；屋頂；房頂 丟棄；放棄 瓦片；瓷磚 Words amp。 Expressions fence can recently pla society inspiration spare model 柵欄；圍墻 金屬罐 最近 行星 社團；社會 靈感；鼓舞人心的人或事物 多余的；空閑的 模型 1a Saving endangered animals is one thing we can do for our world. What else can we do to help save the pla? Rank these items from the easiest (1) to the most difficult (5). stop riding in cars recycle books and paper turn off the lights turn off the shower don’t use paper towels or napkins A: Recycling books and paper is really easy. B: I agree. But it’ s difficult to stop riding in cars. 1b How to save the pla? Check easy (E) or difficult (D). ____* stop riding in cars. ____* recycle books and paper. ____* turn off the lights when you leave the room. ____* refuse to use the plastic bags. ____* don’ t put the waste water into the river. ____* plant more trees and glass. ____*…. E D What Julia and Jack talk about. Check the things. Things Julia and Jack talk about Things Julia is doing now Things Julia will do in the future Things Julia would never do _ turning off the light _ turning off the shower _ stopping using paper napkins _ taking your own bags when shopping. _ not riding in cars _ riding a bike _ recycling paper 2a _ recycling paper _ riding a bike _ not riding in cars _ taking your own bags when shopping. _ stopping using paper napkins _ turning off the shower _ turning off the light Things Julia would never do Things Julia will do in the future Things Julia is doing now Things Julia and Jack talk about Listen again and check the things. 2b Boy: Hey, Julia. Don’ t forget to turn off the lights. It saves electricity. Girl: Oh, I know. I usually do that. I was just in a hurry. How e you’ re so interested in the environment, Jack? Tapescript Boy: I always have been. Lots of people think there’ s nothing they can do, but I just read this book about it, and there are lots of things the average person can do. Girl: Like what? Boy: Well, you should turn off the shower when you’ re washing your hair. Girl: Oh, I’ d never do that! Boy: You wouldn’ t? Girl: No, I have very short hair. I’ m only in the shower for a few minutes. Boy: Well, every minute helps. Girl: What else does it say? Boy: It says you should take your own bags when you go food shopping. Girl: Oh, that’ s not difficult. I can do that. What else? Boy: Hmmm. Here’ s a good one. It says people should stop riding in cars and start riding bikes. Girl: Oh, I’ ll never do that! Can you see me riding 45 minutes to and from school every day? Tapescript Boy: Well, I think the environment is really important. Besides, I like riding my bike. Girl: Y