20xx春牛津深圳版英语九下unit4naturaldisasters1

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.

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

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

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

4、)、生活污水(污水、垃圾)。 防治水污染的方法应科学、切实可行，做法太绝对，不切实际，不可取。 答案安徽理综) 北京奥运会期间对大量盆栽鲜花施用了S诱抗素制剂，以保持鲜花盛开。 S诱抗素的分子结构如图，下列关于该分子说法正确的是()。 A含有碳碳双键、羟基、羰基、羧基B含有苯环、羟基、羰基、羧基C含有羟基、羰基、羧基、酯基D含有碳碳双键、苯环、羟基、羰基解析从题图示可以分析

rst announcement? ② What does the 2. Play the recording and lead ss to finish the listening exercises by taking down the key words. 3. Explain the task to the students: Show an 2. Cultivate ss’