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2. Ask Ss to work in groups of four and one of them to interview the other three. Tell him to ask the questions in Ex1 of Warming Up on P28. Then get one pair to act out their dialogues before the class.

试题详情

1. Ask Ss to discuss the following question.

In what ways do we help the people around?

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2. Get some Ss to present their opinions on the question above before the class.

Suggested Answer:

  Nobody can do everything alone, no matter how powerful he is. Nobody never meets with trouble, no matter how well he is going. So everybody needs others’ help. But we cannot always receive but never give. We must give in return for what we receive. We give help because we have been helped. Since we were born, we have received a lot from the society. So we should return it. We give help today, but we may need help tomorrow. Even if we may not see a person again, by helping him, we can let him know help is necessary and important for those who are in need. By helping each other, people can feel that life is full of warmth and friendliness and is worth living. In a word, to help others is to help oneself.

Step 2. Warming Up

试题详情

1. Lead Ss to the content of this unit. Teacher may say, “We have all heard about Lei Feng, who was ready to help others and set us an example. We live our own lives. Everybody has his own work to do. Why must we help others?”

试题详情

3. To teach how to use the new words and phrases in the text.

Teaching Procedures:

Step 1. Leading-in

试题详情

2. To help Ss to learn about the educational and living conditions of some developing countries and develop their awareness of helping those in need.

试题详情

19.在1.01×105Pa时,16g S在足量的氧气中充分燃烧生成二氧化硫,放出148.5KJ的热量,则S的燃烧热为               ,S燃烧的热化学方程式为                        

 

[学习反馈或反思]:

试题详情

18.在1.01×105Pa时,4g氢气在O2中完全燃烧生成液态水,放出572KJ的热量,则H2的燃烧热为              ;表示氢气燃烧的热化学方程式为             

试题详情


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