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27 tháng 3 2018

10. I've just received a scholarship - ................................. .

A. Really B. Thank you C. Congratulations D. Well

11. They canceled their picnic, ............. the bad weather

A. because B. because of C. when D. and

12. .................... the program is late, we will wait to watch.

A. When B. Because C. Although D. So

13. You can watch Harry Potter on TV ............ you can read it.

A. so B. when C. but D. or

14. - " ...................................................... "

- He is of medium height, with black hair and dark skin

A. What is your new friend like?

B. What does your new friend look like?

C. How is your new frends

D. What does your new friend like?

15. " ...................... do you play table - tennis?"

- Every weekend

A. When B. How often C. How D. What time

16. Excuse me. I am looking for a telephone box

There is one ..................

A. straight B. straight ahead C. turn right D. going left

12 tháng 5 2018

ta có :

\(A=\dfrac{10^{11}-1}{10^{12}-1}\\ 10A=\dfrac{10^{12}-10}{10^{12}-1}=1-\dfrac{9}{10^{12}-1}\\ =>10A< 1\\ B=\dfrac{10^{10}+1}{10^{11}+1}\\ 10B=\dfrac{10^{11}+10}{10^{11}+1}=1+\dfrac{9}{10^{11}+1}\\ =>10B>1\)

=> 10A<10B =>A<B

vậy A bé hơn B

12 tháng 5 2018

Bạn ơi !

Hàng thứ 2 dưới lên phải viết là : Ta có : 10A < 10B => A < B

12 tháng 4 2022

In ra màn hình -> dùng lệnh write hoặc writeln

-> For i:=1 to 10 do writeln(diem[i]);

8 tháng 1 2020

Những từ phát âm /e/ và /ei/ là:

/e/ /ei/

check,head,scent,met,bell,member,

jealous,ready,many,breakfast.

day,later,explain,exchange,rain,

plane,wait,tasty,danger,gate.

Chúc bạn học tốt!

8 tháng 1 2020

trả lời bên dưới rồi nhé không cần đăng lại

18 tháng 2 2021

Cho các câu lệnh sau chỉ ra câu lệnh đúng:

A: for i:=1 to 10; do x:=x+1;

B: for i:=1 to 10 do x:=x+1;

C: for i:=10 to 1 do x:=x+1;

D: for i=10 to 1 do x:=x+1;

18 tháng 2 2021

Cho các câu lệnh sau chỉ ra câu lệnh đúng:

A: for i:=1 to 10; do x:=x+1;

B: for i:=1 to 10 do x:=x+1;

C: for i:=10 to 1 do x:=x+1;

D: for i=10 to 1 do x:=x+1;

1 If there ___________ fewer cars on the road, there would be less accident. *a.beb arec isd were2 I started working here 10 years ago. *a I have worked here for 10 years.b I haven't worked here since 10 years.c I have started working here 10 years ago.d I have started to work here 10 years ago.3 She wouldn't go out if she _____________ the weather forecast. *a is listening tob listenedc listens tod listened to4 We reminded Lily___________ late for our appointment the next day. *a not to beb to...
Đọc tiếp

1 If there ___________ fewer cars on the road, there would be less accident. *

a.be

b are

c is

d were

2 I started working here 10 years ago. *

a I have worked here for 10 years.

b I haven't worked here since 10 years.

c I have started working here 10 years ago.

d I have started to work here 10 years ago.

3 She wouldn't go out if she _____________ the weather forecast. *

a is listening to

b listened

c listens to

d listened to

4 We reminded Lily___________ late for our appointment the next day. *

a not to be

b to don’t be

c to be not

d don’t be

5 Although the weather was cold, the fooball match was not canceled. *

a Despite of cold weather, the fooball match was not canceled.

b Inspite cold weather, the fooball match was not canceled.

c Despite being cold weather, the fooball match was not canceled.

d Despite the cold weather, the fooball match was not canceled.

6 The facsimile _____________by Alexander Bain in 1843. *

a invented

b has invented

c was invented

d has been invented

7 Choose the word whose main stressed syllable is placed differently from that of the other in each group *

a interactive

b attractive

c competitive

d activity

8 Choose the word whose main stressed syllable is placed differently from that of the other in each group. *

a connection

b exciting

c transitive

d impressive

9 Thanks to the weather forecast, many residents __________ the town before the storm swept through it. *

a had left

b will left

c have left

d left

10 “What about going for a walk?” said Peter. *

a Peter suggested go for a walk.

b Peter suggested going for a walk.

c  Peter suggested to going for a walk.

d Peter suggested to go for a walk.

11 I don’t have enough time, so I can’t go on holiday this summer. *

a. If I have enough time, I can go on holiday this summer.

b. Unless I haven’t enough time, I can’t go on holiday this summer.

c. If I haven’t enough time, I can go on holiday this summer.

d. If I have enough time, I can’t go on holiday this summer.

12 They discussed these pollution problems last month. *

a These pollution problems were discussed last month by them.

b These pollution problems were discussed last month.

c These pollution problems was discussed last month by them.

d These pollution problems was discussed last month.

13 The shirt is so expensive that I can’t buy it. *

a The shirt is too expensive for me to buy.

b The shirt is too expensive for me buying it.

c It is such expensive shirt that I can buy it.

d The shirt isn’t cheap enough for me to buy it.

14 Choose the word whose end of /ed/ is pronounced differently from that of the others. *

a occurred

b existed

c warned

d claimed

15 –“Could you bring me some water?" –“___________” *

a Certainly, sir

b No, I can't

c Yes, I can

d I don't want to

16 Choose the word whose main stressed syllable is placed differently from that of the other in each group. *

a emigration

b introduction

c stationery

d exhibition

17 Choose the word whose underlined part is pronounced differently from that of the others. *

a appear

b heavy

c health

d ready

18 We ___________ with each other by mobile phone in 2050. *

a aren’t going to communicate

b won’t be communicating

c aren’t communicating

d haven’t communicated

19 The last time when I saw her was three years ago. *

a I have not seen her for three years.

b I have often seen her for the last three years.

c I saw her three years ago and will never meet her again.

d About three years ago, I used to meet her.

20 I ___________ soccer with my friends this time next weekend. *

a are playing

b am going to play

c was playing

d will be playing

21 –“Would you like a coffee?” –“___________” *

a Not at all

b Yes, let’s

c Yes, please

d Yes, I would

22 Most / us / use / energy. *

a Most of us use too many energy.

b Most us use too many energy.

c Most us use too much energy.

d Most of us use too much energy.

23 Teacher / ask / me / if / speak / English / fluent /. *

a The teacher asks me if I speak an English fluent.

b The teacher asked me if I spoke English fluently.

c The teacher asked me if do I speak English fluently.

d The teacher asks me if I can speak English fluent.

24 Choose the word whose main stressed syllable is placed differently from that of the other in each group. *

a interaction

b practicality

c geography

d ideology

25 I / hope / have / good time / together / see you soon *

a I hope we will have a good time with together and I will see you soon.

b I hope us will have a good time together. See you soon.

c I hope us to have a good time together, and seeing you soon.

d I hope we will have a good time together. See you soon.

26 He said he might _____________ tomorrow. *

a come

b came

c coming

d comes

27 Elie asked Stand___________ to look at the new catalogue. *

a if he wanted

b do you want

c did he want

d whether he wants

28 Lena enjoys _____________ on the phone with her friends. *

a chats

b chatted

c chatting

d chat

29 The teacher said we___________ a week off on the occasion of the International Labor Day. *

a would have

b didn’t have

c have

d will have

30 All the houses in the area_________immediately. *

a have to rebuild

b has to rebuilt

c had to rebuilt

d have to be rebuilt

31 Lien told me that ___________a biology teacher. *

a she wanted becoming

b she wants to become

c she will become

d she wanted to become

32 Don't worry! I _____________ you to solve the problem. *

a helped

b will help

c helping

d help

33 The boy/ old/ enough/ drive/ car *

a The boy is old enough drive a car

b The boy is enough old to drive a car

c The boy is old enough to drive a car

d The boy is old enough for drive a car

34Driving on the left is very dangerous in our country. *

a It very dangerous to drive on the left in our country.

b It is very dangerous driving on the left in our country.

c It is very dangerous to drive on the left in our country.

d It is very dangerous to driving on the left in our country.

35 Lan asked me if I___________that exciting baseball match on TV the previous day. *

a have watched

b was watching

c had watched

d watched

36 She asked me if I___________a laptop computer the following day. *

a buy

b would buy

c will buy

d bought

37 Choose the word whose ended of /s/ is pronounced differently from that of the others. *

a rides

b leaves

c drinks

d travels

38 Honda motorbikes___________in Viet Nam every year. *

a will produce

b produce

c are produced

d would be produced

39 After three hours of considering, we have decided ___________the final decision. *

a to making

b to make

c make

d making

1
22 tháng 5 2021

If there ___________ fewer cars on the road, there would be less accident. *

a.be

b are

c is

d were

I started working here 10 years ago. *

a I have worked here for 10 years.

b I haven't worked here since 10 years.

c I have started working here 10 years ago.

d I have started to work here 10 years ago.

She wouldn't go out if she _____________ the weather forecast. *

a is listening to

b listened

c listens to

d listened to

We reminded Lily___________ late for our appointment the next day. *

a not to be

b to don’t be

c to be not

d don’t be

Although the weather was cold, the fooball match was not canceled. *

a Despite of cold weather, the fooball match was not canceled.

b Inspite cold weather, the fooball match was not canceled.

c Despite being cold weather, the fooball match was not canceled.

d Despite the cold weather, the fooball match was not canceled.

The facsimile _____________by Alexander Bain in 1843. *

a invented

b has invented

c was invented

d has been invented

Choose the word whose main stressed syllable is placed differently from that of the other in each group *

a interactive

b attractive

c competitive

d activity

Choose the word whose main stressed syllable is placed differently from that of the other in each group. *

a connection

b exciting

c transitive

d impressive

Thanks to the weather forecast, many residents __________ the town before the storm swept through it. *

a had left

b will left

c have left

d left

“What about going for a walk?” said Peter. *

a Peter suggested go for a walk.

b Peter suggested going for a walk.

c  Peter suggested to going for a walk.

d Peter suggested to go for a walk.

I don’t have enough time, so I can’t go on holiday this summer. *

a. If I have enough time, I can go on holiday this summer.

b. Unless I haven’t enough time, I can’t go on holiday this summer.

c. If I haven’t enough time, I can go on holiday this summer.

d. If I have enough time, I can’t go on holiday this summer.

They discussed these pollution problems last month. *

a These pollution problems were discussed last month by them.

b These pollution problems were discussed last month.

c These pollution problems was discussed last month by them.

d These pollution problems was discussed last month.

The shirt is so expensive that I can’t buy it. *

a The shirt is too expensive for me to buy.

b The shirt is too expensive for me buying it.

c It is such expensive shirt that I can buy it.

d The shirt isn’t cheap enough for me to buy it.

Choose the word whose end of /ed/ is pronounced differently from that of the others. *

a occurred

b existed

c warned

d claimed

–“Could you bring me some water?" –“___________” *

a Certainly, sir

b No, I can't

c Yes, I can

d I don't want to

Choose the word whose main stressed syllable is placed differently from that of the other in each group. *

a emigration

b introduction

c stationery

d exhibition

Choose the word whose underlined part is pronounced differently from that of the others. *

a appear

b heavy

c health

d ready

We ___________ with each other by mobile phone in 2050. *

a aren’t going to communicate

b won’t be communicating

c aren’t communicating

d haven’t communicated

The last time when I saw her was three years ago. *

a I have not seen her for three years.

b I have often seen her for the last three years.

c I saw her three years ago and will never meet her again.

d About three years ago, I used to meet her.

I ___________ soccer with my friends this time next weekend. *

a are playing

b am going to play

c was playing

d will be playing

–“Would you like a coffee?” –“___________” *

a Not at all

b Yes, let’s

c Yes, please

d Yes, I would

Most / us / use / energy. *

a Most of us use too many energy.

b Most us use too many energy.

c Most us use too much energy.

d Most of us use too much energy.

Teacher / ask / me / if / speak / English / fluent /. *

a The teacher asks me if I speak an English fluent.

b The teacher asked me if I spoke English fluently.

c The teacher asked me if do I speak English fluently.

d The teacher asks me if I can speak English fluent.

Choose the word whose main stressed syllable is placed differently from that of the other in each group. *

a interaction

b practicality

c geography

d ideology

I / hope / have / good time / together / see you soon *

a I hope we will have a good time with together and I will see you soon.

b I hope us will have a good time together. See you soon.

c I hope us to have a good time together, and seeing you soon.

d I hope we will have a good time together. See you soon.

He said he might _____________ tomorrow. *

a come

b came

c coming

d comes

Elie asked Stand___________ to look at the new catalogue. *

a if he wanted

b do you want

c did he want

d whether he wants

Lena enjoys _____________ on the phone with her friends. *

a chats

b chatted

c chatting

d chat

The teacher said we___________ a week off on the occasion of the International Labor Day. *

a would have

b didn’t have

c have

d will have

All the houses in the area_________immediately. *

a have to rebuild

b has to rebuilt

c had to rebuilt

d have to be rebuilt

Lien told me that ___________a biology teacher. *

a she wanted becoming

b she wants to become

c she will become

d she wanted to become

Don't worry! I _____________ you to solve the problem. *

a helped

b will help

c helping

d help

The boy/ old/ enough/ drive/ car *

a The boy is old enough drive a car

b The boy is enough old to drive a car

c The boy is old enough to drive a car

d The boy is old enough for drive a car

Driving on the left is very dangerous in our country. *

a It very dangerous to drive on the left in our country.

b It is very dangerous driving on the left in our country.

c It is very dangerous to drive on the left in our country.

d It is very dangerous to driving on the left in our country.

Lan asked me if I___________that exciting baseball match on TV the previous day. *

a have watched

b was watching

c had watched

d watched

She asked me if I___________a laptop computer the following day. *

a buy

b would buy

c will buy

d bought

Choose the word whose ended of /s/ is pronounced differently from that of the others. *

a rides

b leaves

c drinks

d travels

Honda motorbikes___________in Viet Nam every year. *

a will produce

b produce

c are produced

d would be produced

After three hours of considering, we have decided ___________the final decision. *

a to making

b to make

c make

d making

22 tháng 5 2021

cái này bạn tự làm hả bạn

 

16 tháng 3 2016

H=\(\frac{5}{28}\) + \(\frac{5}{70}\) + \(\frac{5}{130}\) +...+ \(\frac{5}{700}\)

H= \(\frac{5}{4.7}\) + \(\frac{5}{7.10}\) + \(\frac{5}{10.13}\) +...+\(\frac{5}{25.28}\)

H= \(\frac{5}{3}\) (\(\frac{1}{4}\) - \(\frac{1}{7}\) + \(\frac{1}{7}\) - \(\frac{1}{10}\) + \(\frac{1}{10}\) - \(\frac{1}{13}\) +...+ \(\frac{1}{25}\) - \(\frac{1}{28}\))

H= \(\frac{5}{3}\) (\(\frac{1}{4}\) + \(\frac{1}{7}\) - \(\frac{1}{7}\) + \(\frac{1}{10}\) - \(\frac{1}{10}\)+...+ \(\frac{1}{25}\)\(\frac{1}{25}\) - \(\frac{1}{28}\))

H= \(\frac{5}{3}\) ( \(\frac{1}{4}\) - \(\frac{1}{28}\)) = \(\frac{5}{3}\) . \(\frac{3}{14}\)\(\frac{5}{14}\)

30 tháng 5 2022

C, F?

31 tháng 5 2022

C