Lesson 53 Hot snake
·单词
hot adj. 带电的，充电的；温度高的
fireman n. 消防队员
·a fireman
·two firemen
cause v. 引起；n. 原因、起因
·v. 引起 Carelessness causes accidents. 粗心大意引起交通事故
·v. 起因 the cause of the fire 这些火的起因
examine v. 检查
·examiner n. 主考官
·examination n. 检查，考试。可缩写成 exam
accidentally adv. 意为地，偶然地
·accidental adj. 意外的
·accident n. 意外
·do sth. accidentally 偶然做某事
·do sth. by accident 偶然做某事
·do sth. by chance 碰巧做某事
remains n. 尸体，残骸
·the remains of a snake
·remain v. 保持，保留
·remain silent 保持安静
wire n. 电线
·wireless adj. 无线的
·wireless network/mouse/keyboard 无线 网/鼠标/键盘
volt n. 伏特（电压单位）
power line 电力线
solve n. 解决
·solve the mystery 解开谜团
·solve the problem of ... 解决 … 的问题
·solve the problem of air pollution/earthquake 解决 空气污染/地震 的问题
mystery n. 迷
snatch v. 抓住
spark n. 电火花
·本课句型
一般过去时 did
现在完成时 have/has done
现在完成进行时 have/has been doing
名词修饰名词（复数通常后面的名词变复数，前面的名词不变）
·forest fires 森林火灾
·cigarette ends 烟头
·课文
At last firemen have put out a big forest fire in California. Since then, they have been trying to find out how the fire began. Forest fire are often caused by broken glass or by cigarette ends which people carelessly throw away. Yesterday the firemen examined the ground carefully, but were not able to find any broken glass. They were also quite sure that a cigarette end did not start the fire. This morning, however, a fireman accidentally discovered 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 was able to solve the mystery. The explanation was simple but very unusual. 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.
broken glass 碎玻璃
cigarette ends 烟头
throw away 扔掉
wound round 缠绕：指物体围绕另一个物体的表面旋转，形成紧密的连接
electric wire 电线
snatch up 抓起
be able to do 能够做
explanation n. 解释
explain v. 解释
on to 和 on
·on 静态的在 ... 上面
·on to 动态，后来到 ... 上面
wind wound wound
·知识拓展
比较 throw to/throw at/throw away
throw away 扔掉
·Forest fires are often caused by cigarette ends which people carelessly throw away.
throw to 朝着 ... 扔东西
·He threw the ball to me and I caught it.
throw at 瞄着点 ... 扔东西
·The boy threw a stone at the window and broke it.
比较 quite/quiet
quite adv. 相当，很；非常
·They were also quite sure that a cigarette end did not start the fire.
quiet adj. 轻声的，安静的；n. 安静，静谧
·The class kept very quiet during the lesson.
比较 drop/fall
drop vi./vt. 投，丢（把别的东西扔掉）
·A bird had dropped the snake on to the wires.
fall vi. 降落，落下（自己掉落）
·He fell down the stairs and broke his leg.
