1.练习材料
lesson 53 Hot snack
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 fires 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 firemen 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.
2.任务配置:L0+L1+L4
3.知识笔记
(1)查音标
/ˈlɛsn/ 53 /hɒt/ /snæk/
/æt/ /lɑːst/ /ˈfaɪəmən/ /hæv/ /pʊt/ /aʊt/ /ə/ /bɪg/ /ˈfɒrɪst/ /ˈfaɪər/ /ɪn/ /ˌkæləˈfɔːniə/. /sɪns/ /ðɛn/, /ðeɪ/ /hæv/ /biːn/ /ˈtraɪɪŋ/ /tuː/ /faɪnd/ /aʊt/ /haʊ/ /ðə/ /ˈfaɪə/ /bɪˈgæn/. /ˈfɒrɪst/ /ˈfaɪəz/ /ɑːr/ /ˈɒf(ə)n/ /kɔːzd/ /baɪ/ /ˈbrəʊkən/ /glɑːs/ /ɔː/ /baɪ/ /ˌsɪgəˈrɛt/ /ɛndz/ /wɪʧ/ /ˈpiːpl/ /ˈkeəlɪsli/ /θrəʊ/ /əˈweɪ/. /ˈjɛstədeɪ/ /ðə/ /ˈfaɪəmən/ /ɪgˈzæmɪnd/ /ðə/ /graʊnd/ /ˈkeəfli/, /bʌt/ /wɜː/ /nɒt/ /ˈeɪbl/ /tuː/ /faɪnd/ /ˈɛni/ /ˈbrəʊkən/ /glɑːs/. /ðeɪ/ /wɜːr/ /ˈɔːlsəʊ/ /kwaɪt/ /ʃʊə/ /ðæt/ /ə/ /ˌsɪgəˈrɛt/ /ɛnd/ /dɪd/ /nɒt/ /stɑːt/ /ðə/ /ˈfaɪə/. /ðɪs/ /ˈmɔːnɪŋ/, /haʊˈɛvə/, /ə/ /ˈfaɪəmən/ /ˌæksɪˈdɛntəli/ /dɪsˈkʌvəd/ /ðə/ /kɔːz/. /hiː/ /ˈnəʊtɪst/ /ðə/ /rɪˈmeɪnz/ /ɒv/ /ə/ /sneɪk/ /wɪʧ/ /wɒz/ /wuːnd/ /raʊnd/ /ði/ /ɪˈlɛktrɪk/ /ˈwaɪəz/ /ɒv/ /eɪ/ 16,000-/vəʊlt/ /ˈpaʊə/ /laɪn/. /ɪn/ /ðɪs/ /weɪ/, /hiː/ /wɒz/ /ˈeɪbl/ /tuː/ /sɒlv/ /ðə/ /ˈmɪstəri/. /ði/ /ˌɛkspləˈneɪʃən/ /wɒz/ /ˈsɪmpl/ /bʌt/ /ˈvɛri/ /ʌn//ˈjuːʒʊəl/. /ə/ /bɜːd/ /hæd/ /snæʧt/ /ʌp/ /ðə/ /sneɪk/ /frɒm/ /ðə/ /graʊnd/ /ænd/ /ðɛn/ /drɒpt/ /ɪt/ /ɒn/ /tuː/ /ðə/ /ˈwaɪəz/. /ðə/ /sneɪk/ /ðɛn/ /wuːnd/ /ɪtˈsɛlf/ /raʊnd/ /ðə/ /ˈwaɪəz/. /wɛn/ /ɪt/ /dɪd/ /səʊ/, /ɪt/ /sɛnt/ /spɑːks/ /daʊn/ /tuː/ /ðə//graʊnd/ /ænd/ /ðiːz/ /ɪˈmiːdiətli/ /ˈstɑːtɪd/ /ə/ /ˈfaɪə/.
(2) 学单词
1) cause /kɔːz/ v. 引起；n. 原因
2) examin /ɪgˈzæmɪn/ v. 检查
3) accidentally /ˌæksɪˈdɛntəli/ ad. 意外的，偶然的
4) remains /rɪˈmeɪnz/ n. 尸体，残骸
5) wire /ˈwaɪə/ n. 电线
6) volt /vəʊlt/ n. 伏特
7) solve /sɒlv/ v. 解决
8) mystery /ˈmɪstəri/ n. 迷
9) snatch /snæʧ/ v. 抓住
10) spark /spɑːk/ n. 电火花
11) cigarette ends 烟头
12) explanation /ˌɛkspləˈneɪʃən/ n. 解释，说明
(3) 学音标/θ/
发音方法
1) 舌尖微微伸出，置于上下门齿之间，舌身成扁平。
2) 气流由舌齿间泻出，摩擦成音，舌尖和下齿之间的气流通道非常窄小，气流从舌齿间的窄缝中泄出。/θ/是个清辅音，声带不震动。要注意与/ð/,/s/,/z/的区别，发这个音主要是舌尖与上齿之间的摩擦，所以千万不要紧紧咬住舌尖，应该是上齿轻触舌尖。
3) 单词练习
a、在英语中发/θ/这个音一般只有th字母组合,例词：
thing /θɪŋ/ n. 事情
death /deθ/ n. 死
tooth /tuːθ/ n. 牙齿
booth /buːθ/ n. 货摊
cloth /klɒθ/ n. 布
thin /θɪn/ adj. 薄的
bathroom /'bɑːθruːm/ n. 浴室
birthday /'bɜːθdeɪ/ n. 生日
health /helθ/ n. 健康
theater /'θɪətə/ n. 电影院
4) 课文中相关单词
throw
5) 练习感悟
对于/θ/这个音，平时总是缺乏“上齿轻触舌尖”的动作，发音很不标准。通过本课对音标的学习，刻意纠正这个问题。
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