Một xe chuyển động đều trên đường nằm ngang nhờ lực kéo của 1 động cơ là: F= 3000N

a) Xác định lực ma sát giữa bánh xe và mặt đường

b)Biểu diễn các lực theo tỷ xích tuỳ ý chọn

Giúp mình với ạ mai nộp rồi (plz)

I. T×m tõ mµ phÇn g¹ch ch©n cã c¸ch ph¸t ©m kh¸c víi c¸c tõ cßn l¹i

1.A.stamp B. stand C. stadium D. bank

2.A. racks B. shows C. readers D. titles

3.A.exit B. fixing C. writer D. with

4.A.music B. community C. junior D. computer

5.A. liked B. received C. hoped D. stopped

II. Chän ®¸p ¸n ®óng ®Ó hoµn thµnh c¸c c©u sau:

1.Hoa has Physics ……………..Tuesday ………….. 7.50.

A. from- to B. on – at C. at – on D. on – in

2. ……….do you travel to work? – By car.

A. Where B. How C.What D.Why

3.Nam is ………..student in my class.

A.the good B. a best C.the best D. the best of all

4.We learn …………to use a computer.

A. how B. the way C. what way D. a way

5.Ba is good …… repairing ……..appliances.

A. at- house B. on – household C.at- household D. on- house

6. Let’s go to the pop concert at the Sao Mai Club. - …………

A. Ok, we go B. Yes, let we go C. Yes, all right D. Yes, let’s

7.Our summer vacation starts in June. It …………for almost two months.

A. lasts B. takes C. has D.lengthens

8. The dress Hoa made didn’t ….. her. It was too small.

A. match B. fit C. go with D. suit

9.What does your mother look….? – She is tall.

A. at B. like C. after D. for

10.His father doesn’t like carrot.- …………….

A. I don’t like too B. I don’t like neither C.Neither do I D. So don’t I

III. Mçi c©u sau cã mét lçi sai. H·y t×m vµ söa l¹i cho ®óng:

1.Vietnamese students have less vacations than American students.

2. What’s your America’s penpal’s name?

3. Doctor Lai looked at Minh and told him don’t worry.

4. How often is it from your house to your school?

5.My younger sister feels sick . She ate too many ice- cream yesterday.

6.What is your day of birth?- It’s on May 20^th.

7.Would you like to have a dinner with me tonight?

8.How many are the English books? – I think they are two hundred thousand dong.

9.The boys in our class like Ronando very much because he plays soccer very good.

10.How are you today? – Not badly, Thank you

EXERCISE II: USING USED TO/ BE USED TO/ GET USED TO
Choose the best answer A,B OR C to fill in the gap.
1.When I started to work here I needed a lot of help, but now I ______ all
the work on my own.
a. am used to doing b. used to do c. get used to doing

2. He ______ several books a month, but he doesn't have time any more.
a. was used to reading b. got used to reading c. used to read
3. We were surprised to see her driving – she ______ when we first met
her.
a. didn't use to drive b. got used to driving c. was used to driving
4.Don't worry, it's a simple program to use. You ______ it in no time, I'm
sure.
a. used to use b. are used to c. will get used to
5.When I had to commute to work every day, I ______ very early.
a. . used to getting up b. used to get up c. was used to get
6. I'm afraid I'll never ______ in this place. I simply don't like it and never
will.
a. got used to living b. used to live c. get used to living
7. Whenever we came to Coventry, we always ______ in the Central Hotel.
We loved it.
a. used to stay b. got used to staying c. were used to stay

8.When Pete Smith was the head of our office, everything ______ well organized. Now
it's total chaos here.
a. got used to be b. was used to being c. used to be
9.Mr Lazy was shocked when he joined our busy company because he ______
doing much work everyday.
a. wasn't used to b. didn't use to
10. At first the employees didn't like the new open-space office, but in the end they ______
it.
a. got used to b. get used to c. are used to
11. Jim doesn';t have a girlfriend now but he .
a. didn't use to b. used to c. was using to
12. If you go to live in the United Kingdom, you on the left.
a. ll have to get used to drive

b.'ll have to get used to driving
c. 'd have had to get used to

I. Rewrite the sentences below using used to:

1.My mum lived in a small village when she was a girl.

→ My mum _________________________________.

2.There are more vehicles on the roads now.

→ There did not _____________________________.

3.We cycled to school two years ago.

→ We ______________________________________.

4.There did not use to be many traffic accidents before.

→ Now there are _____________________________.

5.My uncle was a bus driver some years ago, but now he has a desk job.

→ My uncle_________________________________.

6. I quite like classical music now, although I wasn’t keen on it when I was younger.

=>I_________________________________.

7.He had a lot of money but helost it all when his business failed.

=>He_________________________________.

8.I seem to have lost interest in my work.

=> I_________________________________.

9.Dennis gave up smoking three years ago.

- Dennis _________________________________.

10.My brother had his hair cut short when he joined the army.

=> My brother _________________________________.

11.My parents lived in the USA when they were young.

=> My parents _________________________________.

12.Jim was my best friend, but we aren’t friends any more.

=> Jim _________________________________.

1 Tìm giá trị lớn nhất của các biểu thức

a, A=2x²+5

b, D= 1/x²+9

c, C=1/(x-1)²+2

d, D=11-(2x-3)²

e, E=15-(2x-1)⁸-(1-2y)

2 Tìm giá trị nhỏ nhất

a, A=(x-2)

b,B=(2x-5)²

c, C=(7-4x)-3

d, D=(3x+2)⁴=9

e, E=(x³-4)⁶+/y-3/-4

f, F=(3x-2)²+4/x+1/+5

Giúp tui với

1 Tìm giá trị lớn nhát của các biểu thức

a, A=-x² d, D=1/x²+9

b, B= xx²+5 e, E=1/(x-1)²+2

c, C=6-x⁴

1Nêu ý nghĩa lịch sử và nguyên nhân chiến thắng chống Tống của nhà Lý. Vai trò của Lý Thường Kiệt

2 Nêu diễn biến cuộc kháng chiến chống Minh của nhà hồ.Cách đánh giặc có gì giống và khác so với cách đánh giặc trong cuộc kháng chiến mông-nguyên của nhà Trần

3 Trình bày bộ máy nhà Trần và nhận xét

Hộ mik vs ạ ngày mai kiểm tra rồi

Văn hóa TQ thời pk ảnh hưởng j đến VN??

giúp mik zới mai mik ktra r