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ngoclam999
2 năm trước
Đốt cháy hoàn toàn 3 gam một hợp chất bằng khí oxi, sau phản ứng thu được 8,8 gam CO¬2 và 5,4 gam nước. Tính khối lượng từng nguyên tố có trong hợp chất trên
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A.2-Read Consumers - innovations -luxuries – replacing - bulbs – households - labeling scheme – therefore - appliances - electricity - effectively In Western countries, electricity, gas, and water are not ______________1_ but necessities. Companies now realize that ____________2_ want products that will not only work ____________3_ but also save money. For most North American___________4_ , lighting accounts for 10 percent to 15 percent of the electricity bill. However, this amount can be reduced by ___________5_ an ordinary 100-watt light bulb with an energy-saving bulb. These _________6_ use a quarter of the __________7_ of standard bulbs and last eight times longer. ____________8_ consumers can save about US7toUS21 per bulb. In Europe, there is a ________________8_ for refrigerators, freezers, washing machines, and tumble dryers. The label tells the consumers how much energy efficiency each model has, compared with other ___________9_ in the same category. Ultimately, these ____________10_will save money as well as conserve the Earth's resources

2. You and your friend come home very late. Other people in the house are asleep. He‟s noisy. YOU: Shhh! Don‟t make so much noise. (you / wake) ……………………………… everybody up. 3. There was a job advertised in the paper recently. At first your brother was interested but then he decided not to apply. YOU: Have you decided what to do about that job that was advertised? YOUR BROTHER: Yes, (I / not / apply) ……………………………. for it. 4. A friend of yours is worried because he has lost an important letter. YOU: Don‟t worry about the letter. I‟m sure (you / find) ………………………………… it. YOUR FRIEND : I hope so. 5. It‟s a nice day. You‟ve decided to sit in the garden. Before you go out, you tell your sister. YOU: The weather‟s too nice to stay indoors. (I / sit) ……………………………. in the garden. YOUR SISTER: That‟s a good idea. I think (I join) ………………………………….. you.

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