九年級(jí)上冊(cè)英語(yǔ)Unit4 Topic2 SectionC 學(xué)案(無(wú)答案）

1、Unit4 Topic2 SectionC 精品學(xué)案一、預(yù)習(xí)熱身。翻譯：A:be named after Mars_ at a distance of._53% as wide as._ two-fifths as strong as._be closest to each other_ search for more information_B:On the surface of Mars_ weight only 36 kilos_ the Roman god of war_ C:Its diameter is 53 as wide as that of the earth. _It ha

2、s been two days since we landed on Mars._二、重難點(diǎn)釋疑。Its diameter is 53 as wide as that of the earth. 它的直徑是地球直徑的53。點(diǎn)撥：as形容詞/副詞原級(jí)as 名詞 像一樣 。考慮：句中that指代_, 假如前面的名詞是復(fù)數(shù)，用_指代。練習(xí)：a.我們學(xué)校像花園一樣美。Our school is _ _ _ a park.b. Tom和Mike跑得一樣快。Tom _ _ _ _ Mike.c.城市的樓比農(nóng)村的高。The buildings in the city _ _ than _ in the co

3、untry.Mars goes around the sun at a distance of about 228 million kilometers. 火星在相距大約兩億兩千八百萬(wàn)千米的地方繞著太陽(yáng)旋轉(zhuǎn)。點(diǎn)撥: at a distance of 相隔 。拓展：at/from a distance 在遠(yuǎn)處 。The gravity on the surface of Mars is about two-fifths as strong as it is on earth. 火星外表的引力大約是地球外表引力的五分之二。點(diǎn)撥：倍數(shù)詞/分?jǐn)?shù)/百分?jǐn)?shù)as 形容詞或副詞原級(jí)as “是的幾倍/幾分之幾/

4、百分之幾。練習(xí)：a.這個(gè)盒子是那個(gè)盒子的四倍重。 This box is _ _ _ _ _ that box.b.這個(gè)房間是那個(gè)房間的三分之一大。This room is _ _ _ _ that room.So a person who weighs 90 kilos on earth weighs only 36 kilos on Mars. 因此，一個(gè)在地球上重90千克的人在火星上只有36千克的重量。點(diǎn)撥：a person who weighs 90 kilos on earth 一個(gè)重達(dá)90公斤的人 考慮：句中第一個(gè)weighs是_句的_; 第二個(gè)weighs是_句的_5.It ta

5、kes a spaceship about eight months to reach Mars from the earth when the two planets are closest to each other.在地球與火星最接近的時(shí)候，宇宙飛船需要用大約8個(gè)月的時(shí)間才能從地球到達(dá)火星。同義句：A spaceship _ _ _ _ _ Mars from the earth when 點(diǎn)撥：be closest to 離最近 。拓展：離近_;離遠(yuǎn)_。6.Scientists are still searching for more information about Mars. 科

6、學(xué)家們?nèi)匀辉谒阉鞲嘤嘘P(guān)火星的信息。 點(diǎn)撥：search 搜尋，搜索，搜尋動(dòng)詞 。拓展：search sb. / sth 搜某人的身/搜某物，search for sb. / sth. 搜尋某人/某物。 練習(xí):消防員在建筑物中搜尋幸存者。Firefighters were _ the building _ survivors.7.It has been two days since we landed on Mars. 我們登上火星已經(jīng)兩天了.同義句：It _two days _ we landed on Mars.練習(xí)：a.自我們上次上街購(gòu)物已經(jīng)是兩個(gè)月了。It _ _ two months

7、 _we _ shopping.b.他父親死了十年了。It _ ten years _ his father _. 同義句：a. His father _ ten years _. b. His father _ _ _ for ten years.8.Whats worse, our water supplies were very low. 更糟糕的是，我們的水供給是非常少。點(diǎn)撥：supply 供給名詞 鏈接：supply 供給動(dòng)詞 supply sth. for sb.= supply sb. with sth.給某人供給某物.9.I often miss the family, but the excitement of being on Mars is worth it. 雖然我經(jīng)常思念家人，但火星探險(xiǎn)的