仁爱版九年级上册英语Unit4Topic2SectionC学案(无答案).docx

第3页Unit4 Topic2 SectionC 精品学案一、预习热身。翻译：A:be named after Marsat a distance of.53% as wide as.two-fifths as strong as.be closest to each othersearch for more informationB:On the surface of Mars weight only 36 kilosthe Roman god of war C:Its diameter is 53% as wide asthat of the earth.It has beentwo days sincewe landed on Mars.二、重难点释疑。1. Its diameter is 53% as wide asthat of the earth.它的直径是地球直径的53%。点拨：as+形容词/副词原级十as十名词 像一样。思考：句中that指代,如果前面的名词是复数，用指代练习：a.我们学校像花园一样美。a park.Our school isTomb. Tom和Mike跑得一样快。Mike.c.城市的楼比农村的高。The buildings in the city than in the country.2 .Mars goes around the sunat a distance ofabout 228 million kilometers.火星在相距大约两亿两千八百万千米的地方绕着太阳旋转。点拨：at a distance of 相隔一。 拓展：at/from a distance 在远处 。3 .The gravity on the surface of Mars is aboutwo-fifths as strong ast is on earth.火星表面的引力大约是地球表面引力的五分之二。点拨：倍数词/分数/百分数十as十形容词或副词原级+as是的几倍/几分之几/百分之几”。练习：a.这个盒子是那个盒子的四倍重。This box isthat box.b.这个房间是那个房间的三分之一大。This room is that room.4 .So a personwho weighs 90 kilos on earthweighs only 36 kilos on Mars.因此，一个在地球上重90千克的人在火星上只有36千克的重量。点拨：a person who weighs 90 kilos on earth 一个重达 90 公斤的人思考： 句中第一个 weighs是句的;第二个 weighs是句的5.It takes a spaceship about eight months to reach Mars from the earth when the two planets are closest toeach othe在地球与火星最接近的时候，宇宙飞船需要用大约8个月的时间才能从地球到达火星。同义句： A spaceshipMars fromthe earth when 点拨：be closest to 离一最近 。 拓展： 离一近;离远 o6.Scientists are still searching formore information about Mars. 科学家们仍然在搜 索更多有关火星的信息。点拨：search搜寻，搜索，搜查（动词）。拓展：search sb. / sth搜某人的身/搜某物，search for sb. / sth.搜寻某人/某物。练习：消防员在建筑物中搜寻幸存者。Firefighters were the buildingsurvivors.7.It has been two days sincewe landed on Mars.我们登上火星已经两天了 .同义句：It two days we landed on Mars.练习：a.自我们上次上街购物 已经是两个月了。It two months we shopping.b.他父亲死了 十年了 o It ten years his father.同义句：a. His father ten years.b. His father for ten years.8.What' s worse, our watesupplieswere very low.更糟糕的是，我们的水供给是非 常少。点拨：supply供给（名词）链接：supply 供应（动词）supply sth. for sb.= supply sb. with sth给某人供应某物.9.I often miss the family, but the excitement of being on Marsis worth it.虽然我经常思念家人，但火星探险的兴奋和冒险还是值得的。点拨：be worth sth.值，链接：be worth doing sth.某事值得做。练习：这事值得我们付出劳动。It our work.这本书值得一读。The book