your pens and notebooks. Students from other grades are welcome. Unit 8 课本：
1. translate the following phrases into English 1. work and power 2. an object 3. work done
4. in the direction of the force 5. apply a force of 2000 newtons 6. the height of 2 meters
7. by doing the following calculation 8. power is measured in watts(w).
2.translate the following sentences into English.
1.work done equals force times distance moved in the direction of the force.
2.if a force of 1 N cause an object to move 1 meter, than 1 J of work has been done.
3.power is a measure of how rapidly work is being done. 4.if a person or a machine is doing 1 J of work each second, the power rating is 1 W.
5.the current flowing through a resistor is directly
proportional to the potential difference across its ends providing the temperature remains constant. This is Ohm’s Law.
6.Ohm’s Law applies to both direct current (DC) and alternating current(AC). 练习册： For reference: 1. We are sorry to hear
2. A lot of people have been injured 3. It is our duty to help those 4. that all the students in our school 5. the warm clothes 6. it is our tender regards Unit 9
Red Cross Hospital Patient Information From
Name: zhang xiaolin Sex: Female Male √ Date of Birth: August 24, 1980 Month date year
Permanent Address: 108, changjiang Street, Beijing 10035
Apt. st. city zip code Telephone :010 234565 Your problem:
Last night I had a fever and cough. Now my throat is painful and I have a bad headache. I don’t feel well. 练习册：
One possible version:
The hot summer is coming. The germs are on food and we will be sick if we eat it. If you want to avoid the sickness, you should observe canitary.
1) don’t drink the water that hasn’t been boiled. 2) The things we eat must be clean. 3) Don’t eat the food which is rotten.
4) The clothes we wear must be constantly changed. 5) We must bathe every day.
6) The classroom and dormitory must be cleaned every day. Unit 10 课本：
Attention, please. The weather forecast center has warned that a storm is coming today. The school asks the students to close all the windows and doors in the classroom before the storm comes. Please do it as you are asked. Thank you. 练习册：
One possible version:
Attention, everyone in Grade Two. We’ve decided to visit the Science Museum this weekend on Saturday. You can go there either by bus or by bike. We’ll gather in front of the gate of the museum at 8:00 in the morning. Please be there in time. That’s all. Thank you. Unit 11 课本：
On possible version:
As we all know, reading is very important. But what kind of books should be read by students in their spare time? In my opinion, students should read different kinds of books in their spare time to gain knowledge in different areas. But they must spend their time suitably and make plans for their spare time. Reading the reference books and the guide to examinations
only is too limited. It is very useful and necessary for students to know about more knowledge in different areas. It will be helpful in their future development. So, in order to make further development, students read many kinds of useful books in their spare time. 练习册：
One possible version:
I agree with the saying“time is money”. Money is a resource that everybody wishes they could have much more, and in fact, most people share the opinion as for money the more the better. Time is the same thing. It can be considered in the same way. We usually need more of it, and we usually don’t have enough it into time. For example, if you have more money, you can fly to a city instead of talking a train, which will give you more time to do other things. So I think time is money and, if one is going to live a productive life. Unit 12 课本：
My grandpa is about 75. He is a retired worker. Almost everyone of his neighbors says he is a very kind man. In fact, he is always ready to help others.
Every morning, grandpa gets up early and cleans the public