Để bơm đầy một khí cầu đến thể tích 100m³ có áp suất 0,1atm ở nhiệt độ không đổi người ta dùng các ống khí hêli có thể tích 50 lít ở áp suất 100 atm. Số ống khí hêli cần để bơm khí cầu bằng ?

Bài 5. Bạn Hòa đi học từ nhà đến trường theo hướng Tây – Đông, chuyển động của bạn Hòa được xem là chuyển động thẳng đều với vận tốc 10 km/h từ 5 giờ sáng. Khoảng cách từ nhà bạn Hòa đến trường là 15 km. Chọn mốc tính độ dịch chuyển tại nhà bạn Hòa, chiều dương theo hướng Tây – Đông. Chọn mốc tính thời gian lúc 5 giờ (t₀ = 5 h).
a) Viết phương trình độ dịch chuyển của bạn Hòa.
b) Xác định thời điểm bạn Hòa cách nhà 10 km.
c) Xác định thời điểm bạn Hòa đến trường.

he was punished by the teacher because he didn't do his homework => Had

Có hai động cơ điện dùng để đưa gạch lên cao. Động cơ thứ nhất kéo được 10 viên gạch, mỗi viên nặng 20N lên cao 4m. Động cơ thứ hai kéo được 20 viên gạch, mỗi viên nặng 10N lên cao 8m. Gọi công của động cơ thứ nhất là A₁ , của động cơ thứ hai là A₂. So sánh hai công

Nêu hiện tượng và viết phương trình phản ứng xảy ra khi :
a) Cho dd KOH vào dd AgNO₃
b) Cho từ từ dung dịch KOH đến dư vào dung dịch Al₂(SO₄)₃.
c) Cho Ca vào dd MgCl₂.
d. Cho Fe dư vào dd H₂SO₄ đặc nóng.

1.if people use public transport more frequently, there will be less traffic congestion => the more

2.as the street was getting more and more crowded, it was harder for us to dirve home => the

3.i think i'm getting a cold because of the unpredictable weather => i think i'm coming

4.we 're trying to reduce the amount of plastic in our house => we're trying to reduce the amount of plastic in our house

I'm in class 6H. What a____ you? – I'm in class 6G.

21. I go out less than I used to.
→ I don’t ....................................................

22. No game show on VTV3 is as popular as “Olympia”.
→ Olympia is ....................................................

23. No one in Mary’s class is as excellent as her.
→ Mary is ....................................................

24. Lan plays chess better than Hoang does.
→ Hoang ....................................................

E. Choose the correct answer.
37. Three people were captured at the ________ today trying to get into the country.
A. line
B. equator
C. border
D. edge

38. There’s a fantastic ________ from the top of the Empire State Building!
A. view
B. sight
C. appearance
D. look

39. Once we get to the hotel, let’s just ________ quickly and then do a bit of sightseeing.
A. set down
B. make up
C. check in
D. turn up

Đề bài: Put the verbs in the correct tense:

13. In the future,many young people .................. star up their own businesses.

A. will B. am going to C. both A & B

14. the sky is blue. It .............. another hot day.

A. will B. am going to C. both A & B

Exercise 5: Circle the correct options to complete the sentences.

1.City people seem to react quicklier / more quickly to changes than countryside people.
2.She came to the party later / more lately than her friends.
3.Does a computer work at calculus more fast / faster than a human being?
4.Nga writes English essays better / more well than Mai.
5.Nick can jump higher / more high than Mike.
6.Today it’s raining more heavily / heavier than it was yesterday.
7.Juice contains more / many vitamins than coke.
8.The farmers in my village work hard / harder than the ones here.
9.People in rural areas talk optimistically / more optimistically than city people.
10.Ms. Sarah dances more beautifully / beautifully than Ms. Susan.

Exercise 8. Fill in each blank with although/ despite.

1._________________ we are a small company, we sell almost a hundred machines a month.

2. _________________ all the difficulties, the project started on time and was a success.

3. _________________ we were warned against doing so, we went ahead with the project.

4. _________________ his lack of experience, he became a successful businessman.

5. ________________ being by far the oldest player, he scored three goals.

VỀ BÊN MẸ

                                   (Đặng Minh Mai)

Về bên mẹ thấy lòng ấm quá
Bao ngày qua vất vả dòng đời
Hôm nay về lại bên người
Rưng rưng dòng lệ nghẹn lời trong con

  Thấy mẹ khoẻ và còn minh mẫn
Tim con vui sướng nhất mẹ à!
Dang vòng tay rộng bao la
Ôm con mẹ nói sao mà nhớ ghê

Con đã lớn nhưng về bên mẹ
Con thấy mình thơ trẻ quá thôi
Muốn lời ru mẹ bên nôi
Đắm chìm âu yếm trong đôi mắt cười

6. Would you like to decorate your room on your own? ( Want ) => Do .. yourself?

7. During dinner she never watches TV =>While ..

8. Jack likes painting portraits (Keen ) => ..

9. Both Jonh and Mary enjoy team sports ( So ) => Jonh enjoys ..

10. How about cycling to the country this weekend ( Cycling ) => Let's ...

26. Mary said: “I cannot go to the movies with you, John.”
Mary told John that ..........................................................

27. “I’d buy the big tin if I were you,” said the grocer.
The grocer told me that ......................................................

28. Mary says: “I usually get up much earlier than you do, Tom.”
Mary says to ..................................................................

1. we should bring a reusable bag when going shopping =>A

2. Have you discussed the problem with anyone? => Giải thĩhs nx nha

We should 't go hiking today because it is raining very hard.

=> It is

It 's a good idea to bring some batteries when we go camping

=>We should

A very ___ player muggsy bogues in only 160 cm.

Nêu chủ đề của văn bản "hoa bạch đàn" của nguyễn phan khuê

2. Parking Form
Complete and place in lower left-hand corner of windscreen

Car registration …………………
Date …………………

A Register your car here by filling in this form.
B Put this form in your car windscreen after filling it in.
C Place the completed form at the top of your car windscreen.

3. NOTICES
Boat Trip to Woodley Place

Due to high water levels, this trip will now take place by coach at no extra cost.
The pick-up time from the hotel remains unchanged.

C. take account of    D. be useful for

Parents should encourage their kids to share the housework for their own good as well as the good of the whole family.
A. comfort
B. respect
C. appreciate
D. stimulate

V. Choose the best options to complete the following sentences.

1.As a homemaker, ______.
A. she does a lot of online jobs at home to earn money
B. she spends most of her time taking care of her family
C. she doesn't have time to look after her children
2,She is overworked, ______.
A. so she doesn't earn enough money to support her family
B. so she doesn't have time to take care of her home
C. so she spends a lot of time with her children
3.Sweetie, get yourself prepared for dinner. ______.
A. You are cooking dinner today.
B. You should help me cook dinner.
C. Wash your hands carefully before eating.
4.Let's lay the table. ______.
A. It's time for lunch.
B. We should call to reserve a table.
C. We should do the washing-up before we leave.
5.Look! It's raining. Hurry and ______.
A. put away the clothes
B. fold the clothes
6.As the breadwinner of the family, ______.
A. Sarah quitted her job to take care of her home
B. Sarah works hard to support her family
C. Sarah stays at home to educate her children
7.There is chore equity in Mr. and Mrs. Brown's family. ______.
A. They share the equal amount of housework.
B. Mr. Brown is the breadwinner and Mrs. Brown is the homemaker.
C. Mrs. Brown does more housework than Mr. Brown.
8.Husbands should help do the heavy lifting such as ______.
A. helping the children with Math problems
B. repairing the roof of the house
C. cooking and watering houseplants

1. Because it is rain, we stopped the match = Because of

2. Because Tom was ill, he is absent today = Because of

3. Because she is kind, every one loves her = Because of

4. Because I was too tired, I will have a long trip = Because of

5. Because he passed the exam, his parent very proud of him = Because of