20xx春牛津深圳版英语九下unit3theenvironment4内容摘要:
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 ss’ interest in thinking and 10 Louise talk about? ④ How many factors did Louise mention that cause noise pollution? Present some expressions and sentences. talking. 第三环节 表示关切和担忧。 Step3 Speaking Learn the expressions of concern。20xx春牛津深圳版英语九下unit3theenvironment4
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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
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,
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’
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.
t the standard pronunciation of the new words. 5 第二环节 学习重点单词的重点用法 Step 2. Learn about the new words 3. Learn about the new words. Selfstudy the usage of the key words: earthquake, flood, badly, alive
get the main idea. Divide the passage into 3 parts. Part1: Before the 2.① Guide students to scan and answer questions. ② Ask students to listen to skim to get the required information. Ask students