新概念英语第二册课件Lesson53(共19张PPT)

1、 53.Hot Snake 触电的蛇At last firemen have put out a big forestfire in California. Since then, they havebeen trying to find out how the fire began.Forest fires are often caused by brokenglass or by cigarette ends which peoplecarelessly throw away. Yesterday the fire-men examined the ground carefully, bu

2、twere not able to find any broken glass.They were also quite sure that a cigaretteend did not start the fire. This morning,however, a fireman accidentally dis-covered the cause. He noticed the remains of a snake which was wound round the electric wires of a 16,000-volt power line. In this way, he wa

3、s able to solve themystery. The explanation was simple butvery unusual. A bird had snatched up the snake from the ground and thendropped it on to the wires. The snake then wound itself round the wires. Whenit did so, it sent sparks down to the ground and these immediately started a fire.New words an

4、d expressionshot adj. 带电的，充电的 a hot wire高压电线热的 麻辣烫：hot-hot-hot 辣鸡翅：hot-wingshot-line :热线hot topic :热门话题hot potato :烫手山芋（喻指棘手的问题）hot dog :热狗 firemann. 消防队员 mn firemen 复数 mencausev. 引起； n. 原因n: What is the cause of failure?v: cause sth.: 引起麻烦What causes the failure?cause sb to do sth. :导致某人做某事Illness

5、caused him to lose the game.Because 因为 be causeexaminev. 检查examine sth. examination n. physical examination 身体检查accidentallyadv. 意外地，偶然地accident : n. 事故accident-accidental-accidentallyI met my favorite singer star accidentally.remainsn. 尸体，残骸dead bodycorpse k:psremain:遗迹；剩余物wiren. 电线 electric wire v

6、oltn. 伏特（电压单位）power line电力线solvev. 解决solve the mystery(迷)solve the problemmysterymistri n. 谜,神秘snatchv. 抓住 snatch up 夺取，抓取sparkn. 火花electric spark 电火花 Questions1.What are forest fires often caused by?2.What caused the fire?1.Forest fires are often caused by broken glass or by cigarette ends which pe

7、ople carelessly throw away.2.A bird had snatched up the snake from the ground and then dropped it on to the wires. The snake then wound itself round the wires. When it did so, it sent sparks down to the ground and these immediately started a fire.Language points:1.put out a fire : 扑灭火 Firemen tried

8、to put out the fire .2.Since then, they have been trying to find out how the fire began.since then: 从那时起到现在为止have been doing 现在完成进行时Since last month, I have been trying to lose weight.find out 查明find out the truth宾语从句be able to do 能够做某事 canI am able to paly basketball/speak English.in this way :以这种方

9、式只有以这种方式才能解决问题。Only in this way can you solve this problem.Forest fires are often caused by broken glass or by cigarette ends which people carelessly throw away. fires 复数，泛指许多火灾 broken glass碎玻璃 break glass 不可数 a glass 一个玻璃杯glasses 眼镜 Do you know the man wearing glasses over there? cigarette ends香烟头

10、which 引导定语从句，在从句中充当宾语 thatWhat can we do to avoid forest fire?1.awareness 意识2.from small things 3.from ourselves3.call on 呼吁54. Sticky Fingers 粘糊的手指After breakfast, I sent the children toschool and then I went to market. It wasstill early when I returned home. Thechildren were at school, my husband

11、wasat work and the house was quiet. So Idecided to make some tarts for tea. In ashort time I was busy mixing butter andflour and my hands were soon coveredwith sticky pastry. At exactly that mo-ment, the telephone rang. Nothing couldhave been more annoying. I picked up thereceiver between two sticky fingers andwas dismayed when I recognized thevoice of Mrs Bates. It took me ten minutesto persuade her to ring back later. At lastI hung up the receiver. What a mess!There was pastry on my fingers, on the telephone, and on t