20xx春牛津深圳版英语九下unit3theenvironment3内容摘要:
25 finish the chart. 第二环节 自学课文中的语言点 Step 2 Language points (selfstudy). 2. Selfstudy on the language points. ① Read the text to find the important words and phrases: destroy, nature, soil, flood, friendly, recycle, purpose and phrases result in, make a difference. ② Learn the learning sheet to finish the related exercise. ③ Group work to share the learning result and help to solve the different points. ④ Show the learning result by groups. 2. Present the learning sheet。20xx春牛津深圳版英语九下unit3theenvironment3
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the main idea by skimming scanning and taskreading. 2.① Read the passage and get the main idea. ② Read the passage paragraph by activity teaching ① Guide students to scan and answer 2. Improve Ss’
the usage of the key words: atmosphere, temperature, guess, 2. Play the CD for ss and help ss with difficult words. them to learn the key points on the learning sheet 2. Students get the standard
3、理它,得到的有机物可能是()。 解析用 理为酯交换反应,其产物应为 答案品保鲜膜按材质分为聚乙烯(聚氯乙烯(聚偏二氯乙烯(种类。 广泛地用于食品、蔬菜外包装,它对人体有潜在危害。 下列有关叙述不正确的是 ()。 A体可由 单体与氯化氢加成制得B鲜膜属于链状聚合物,在加热时易熔化,能溶于氯仿C鉴别 把二者分别放入试管中加强热,在试管口放置一湿润的蓝色石蕊试纸,如果试纸变红,则是 变红,则为
3、= = =高 温 反应中氧化剂为_。 解析(1)合金的熔点比成分金属的熔点低;反应原理是气体分子数减小的放热的可逆反应,故应采取低温、高压的条件;催化剂只能改变反应速率,不能使平衡移动,没法提高贮氢合金的贮氢能力。 (2)根据其“高强度、耐高温、耐腐蚀”的特点,可判断它应属于原子晶体;N 元素价态的变化是 0 价3 价,在反应中得到电子,作氧化剂。 答案(1)低 低温
recording and lead ss to finish the listening exercises by taking down the key words. 3. Explain the task to the students: Show an example to students : 2. Cultivate ss’ listening ability. 3. Arouse
he same as” and “different from” 3. Read the sentences and try to conclude: “the” is often used ahead of “same”, nouns are often used after “same”. ss to work in groups and find out all the rules 3.