Trong mặt phẳng hệ trục tọa độ Oxy , cho tam giác ABC có A(1;-3), B(4;2), C(-2;-1) |
1) Viết phương trình tổng quát của đường thẳng A, qua A và vuông góc BC.
2) Viết phương trình tổng quát của đường thắng A, qua B và vuông góc AC.
3) Viết phương trình tổng quát của đường thẳng A, là đường trung trực của đoạn thẳng AB .

Exercise 2. Change the following sentences into the passive voice:

. Someone stole my bag in the store ..........................................................................................................................................................

2. People don’t use this road very often. ..........................................................................................................................................................

3. They have changed the date of the meeting .......................................................................................................................................................... 4. Kelly can’t use this office right now. ..........................................................................................................................................................

5. My father painted this room since I was small. .........................................................................................................................................................

. 6. The workers are building a new road to my village. .........................................................................................................................................................

. 7. You should learn all the grammar rules. ..........................................................................................................................................................

8. She has cleaned the floors. ..........................................................................................................................................................

9. They will rebuild this rest room next month. .......................................................................................................................................................... 10. Karen is going to send the catalogue by air. ..........................................................................................................................................................

Exercise 1. Change the following sentences into the passive voice: 1. You may forget the rules quickly. ..................................................................................................................

2. You should study the lessons repeatedly. ..................................................................................................................

3. Benjamin must win the competition. ..................................................................................................................

4. They should cancel the game. ..................................................................................................................

5. People can find some interesting animals in the zoo. ..................................................................................................................

6. They can’t build a new house at this location. ..................................................................................................................

7. We can’t drive this old car safely any more. .................................................................................................................

8. You should eat a hamburger with your hands – not a fork. ..................................................................................................................

9. You must put this glass vase in a safe place. ..................................................................................................................

10. Can just one person move that heavy chair? ..................................................................................................................

___________________________________________________________

1. Lan buys some new books _______________________________________________________________________

2. They will visit the temple next week _______________________________________________________________________

3. My friend will send me a letter next week _______________________________________________________________________

4. People will build this hotel in 2010 __________________________________________________________________________

5. We collect used paper for recycling _________________________________

6. She cleans the hose every day __________________________________________________________________________

7. Jane sees the boy riding a buffalo __________________________________________________________________________

8. Miss Thu will make me a new dress __________________________________________________________________________

9. Tim will meet me at the airport __________________________________________________________________________

10. Many people speak English in over the world _______________________________________

I. Rewrite the sentences in the passive voice form.
1. People will use cloth bags in the future. __________________________________________________________________________
2. My cousin will meet you at the station. __________________________________________________________________________
3. They will hold the meeting before May Day. __________________________________________________________________________
4. Will you invite her to your wedding party? __________________________________________________________________________
5. We might find life on another planet. __________________________________________________________________________
6. We have to improve all the schools in the city. __________________________________________________________________________
7. You must do this exercise carefully. __________________________________________________________________________
8. We can solve the problem. __________________________________________________________________________
9. People should stop experiments on animals. __________________________________________________________________________
10. Nam will buy a new shirt
. _____________________________________________________

cho 70,25g hỗn hợp kx,ky tác dụng vứi 400ml dd AgNO3 1M, tiếp tục cho dd HCl vào dung dịch sau phản ứng thấy tác dụng hết 200ml dd HCl 10%. tìm KX,KY

thang máy bắt đầu đi lên theo 3 giai đoạn: nhanh dần đều không vận tốc đầu với gia tốc 2m/s2 trong 1s

đi đều trong 5 s tiếp theo. chuyển động chậm dần đều cho đến khi dừng lại hết 2s. xác định

a, vận tốc của chuyển động đều

b, quãng đường tổng cộng mà thang máy đi được

c, vận tốc trung bình của thang máy trong suốt thời gian chuyển động

1 vật bắt đầu chuyển động thẳng nhanh dần đều với gia tốc a, đi được quãng đườn s trong thời gian t

tính khoảng thời gian vật đi :

1, 1 m đầu tiên

2, 1 m cuối cùng