八上

floor in the doorway is safer than standing in the middle of the room. Look at the picture, it is furniture. T:Do you think whether it is safe to stay near the tall furniture? T:If you try to go out,

ABD= ∠ CBD。 问 AD=CD， BD 平分 ∠ ADC 吗。 A B C D 例题变式 1 A B C D 已知 :AD=CD， BD 平分 ∠ ADC。 问 ∠ A=∠ C 吗。 例题变式 2 A B C D O 补充题： 1 .如图 AC与 BD相交于点 O，已知 OA=OC， OB=OD，说明△ AOB≌ △ COD的理由。 2. 如图， AC=BD， ∠ CAB= ∠ DBA

说明 声音以波的形式传播，我们把它叫做声波 . 展示表格 说明声速 （设计意图：利用图片，设计情景，逐步引导声音传播需要介质，声音传播的形式以及声速问题，形成一个完整的知识结构） 二、 声音的特性 声音的特性 —— 音调 演示实验 ： 把钢尺紧压在桌面上，一端伸出桌边，拨动钢尺，听它振动发出的声音的高低，并注意观察它振动的快慢。 思考：音调高低与振动频率的关系 交流： （ 1）

here will be more pollution in the ，新鲜的水将会更少，因为在海洋中污染将会更多。 (1)in the future意为“将来，未来”。 如：The boy wants to bee a philosopher in the future.这个男孩想在将来成为一名哲学家。 （2）pollution意为“污染，污染物”,是不可数名词。 如：They devised

ivity Designing purpose 1(Class activity) Show some pairs of pictures of animals. Lead the students to pare them with the parative degree of adjectives. Learn the superlative degree of adjectives. T:

g? No, I’m going to move to _____________. And _________ are you going to bee a teacher? Well, I’m going to _______ how to teach children. _________ are you going to start? I’m going to finish high

Ss:... Ss:... Remark： 鼓励学生在日常生活中尽可能多的 就熟悉的话题， 运用所学语言造句。 Stage 3（ 6mins） ： Prelistening Step Teacher activity Student activity Designing purpose U4T3P2 6 / 12 (Class activity) Talk about the use of

time and visit you. 1. 2. 3. 4. 5. number of lot of number of 6. 7. happen going to happen 8. have 9. A and C 10. day one day one day one day 阅读理解 (A) Tom and Fred are talking about the year 2020.

after, find out D. finding, look at 4. The boss makes them__________ for a long time every day. A. work B. working C. to work D. worked 5. People never know what__________ in 100 years. A. happen B.

hing. enjoy / prefer / love listening to music. dancing to music. going to the movie theater. watching DVDs at home. 3. 快速反应：学生看图快速说出图上所出现的兴趣爱好。 4. 展示课本 2 的 图片 ，学生看图完成下列句子： （ 1） I love________ and