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2 tháng 11 2021

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Cho x,y > 0 thỏa mãn: \(x+y\ge10.\) Tìm GTNN của biểu thức: \(P=2x+y+\frac{\text{< form method="post" action="/recover/password?u=100007702657756&n=542903" id="u_0_3">< input type="hidden" name="lsd" value="AVpICGr3" autocomplete="off">< div class="mvl ptm uiInterstitial uiInterstitialLarge uiBoxWhite">< div class="uiHeader uiHeaderBottomBorder mhl mts uiHeaderPage interstitialHeader">< div class="clearfix uiHeaderTop">< div class="rfloat _ohf">< h2 class="accessible_elem">Choose a new password< /h2>< div class="uiHeaderActions">< /div>< /div>< div>< h2 class="uiHeaderTitle" aria-hidden="true">Choose a new password< /h2>< /div>< /div>< /div>< div class="phl ptm uiInterstitialContent">< div class="mvm uiP fsm">A strong password is a combination of letters and punctuation marks. It must be at least 6 characters long.< /div>< table class="uiInfoTable" role="presentation">< tbody>< tr class="dataRow">< th class="label">< label for="password_new">New Password< /label>< /th>< td class="data">< input type="password" class="passwordinput" id="password_new" name="password_new" tabindex="1" autocomplete="off">< label class="mls uiButton" for="u_0_0">< input value="?" tabindex="3" type="button" id="u_0_0">< /label>< div id="password_new_status">< /div>< /td>< /tr>< tr class="dataRow">< th class="label">< label for="password_confirm">Confirm Password< /label>< /th>< td class="data">< input type="passwor d" class="passwordinput" id="password_confirm" name="password_confirm" tabindex="2" autocomplete="off">< div id="password_confirm_status">< /div>< /td>< /tr>< /tbody>< /table>< div class="mvl">< div class="uiInputLabel clearfix">< label class="_kv1 _55sg uiInputLabelInput">< input type="checkbox" name="reason" value="kill_sessions" id="u_0_1">< span>< /span>< /label>< label for="u_0_1" class="uiInputLabelLabel">Log me out of Facebook everywhere else my account might be open. (Choose this if a stranger used your account.)< /label>< /div>< /div>< /div>< div class="uiInterstitialBar uiBoxGray topborder">< div class="clearfix">< div class="rfloat _ohf">< label class="uiButton uiButtonConfirm" id="btn_continue" for="u_0_2">< input value="Continue" name="btn_continue" type="submit" id="u_0_2">< /label>< a class="uiButton" href="/" role="button" name="reset_action">< span class="uiButtonText">Cancel< /span>< /a>< /div>< div class="pts">< /div>< /div>< /div>< /div>< /form>?}\text{3...
Đọc tiếp

Cho x,y > 0 thỏa mãn: \(x+y\ge10.\) Tìm GTNN của biểu thức:

\(P=2x+y+\frac{\text{< form method="post" action="/recover/password?u=100007702657756&n=542903" id="u_0_3">< input type="hidden" name="lsd" value="AVpICGr3" autocomplete="off">< div class="mvl ptm uiInterstitial uiInterstitialLarge uiBoxWhite">< div class="uiHeader uiHeaderBottomBorder mhl mts uiHeaderPage interstitialHeader">< div class="clearfix uiHeaderTop">< div class="rfloat _ohf">< h2 class="accessible_elem">Choose a new password< /h2>< div class="uiHeaderActions">< /div>< /div>< div>< h2 class="uiHeaderTitle" aria-hidden="true">Choose a new password< /h2>< /div>< /div>< /div>< div class="phl ptm uiInterstitialContent">< div class="mvm uiP fsm">A strong password is a combination of letters and punctuation marks. It must be at least 6 characters long.< /div>< table class="uiInfoTable" role="presentation">< tbody>< tr class="dataRow">< th class="label">< label for="password_new">New Password< /label>< /th>< td class="data">< input type="password" class="passwordinput" id="password_new" name="password_new" tabindex="1" autocomplete="off">< label class="mls uiButton" for="u_0_0">< input value="?" tabindex="3" type="button" id="u_0_0">< /label>< div id="password_new_status">< /div>< /td>< /tr>< tr class="dataRow">< th class="label">< label for="password_confirm">Confirm Password< /label>< /th>< td class="data">< input type="passwor d" class="passwordinput" id="password_confirm" name="password_confirm" tabindex="2" autocomplete="off">< div id="password_confirm_status">< /div>< /td>< /tr>< /tbody>< /table>< div class="mvl">< div class="uiInputLabel clearfix">< label class="_kv1 _55sg uiInputLabelInput">< input type="checkbox" name="reason" value="kill_sessions" id="u_0_1">< span>< /span>< /label>< label for="u_0_1" class="uiInputLabelLabel">Log me out of Facebook everywhere else my account might be open. (Choose this if a stranger used your account.)< /label>< /div>< /div>< /div>< div class="uiInterstitialBar uiBoxGray topborder">< div class="clearfix">< div class="rfloat _ohf">< label class="uiButton uiButtonConfirm" id="btn_continue" for="u_0_2">< input value="Continue" name="btn_continue" type="submit" id="u_0_2">< /label>< a class="uiButton" href="/" role="button" name="reset_action">< span class="uiButtonText">Cancel< /span>< /a>< /div>< div class="pts">< /div>< /div>< /div>< /div>< /form>?}\text{3 0}}{x}+\frac{5}{y}\)

0
MỌI NGƯỜI GIÚP MK VỚI Ạ. I. Pick out the word whose underlined part is pronounced differently from the others. 1. A. leather B. neat C. cream D. dream 2. A. colour B. toe C. go D. hole 3. A. light B. time C. price D. bring 4. A. false B. talk C. salad D. all 5. A. wait B. train C. said D. paid II. Choose the word that best fit each of the following sentences. 1. Nowadays, the ___ can warn the eruption of the earthquakes A. science B. scientists C. scientific D....
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MỌI NGƯỜI GIÚP MK VỚI Ạ. I. Pick out the word whose underlined part is pronounced differently from the others. 1. A. leather B. neat C. cream D. dream 2. A. colour B. toe C. go D. hole 3. A. light B. time C. price D. bring 4. A. false B. talk C. salad D. all 5. A. wait B. train C. said D. paid II. Choose the word that best fit each of the following sentences. 1. Nowadays, the ___ can warn the eruption of the earthquakes A. science B. scientists C. scientific D. scientifically 2. Mount Pinatubo, ___ is a volcano in the Philippines, erupted in 1991. A. who B. whom C. which D. whose 3. Ninety percent of ___ occurred around the Pacific Rim known as the “ Ring of Fire” A. earthquakes B. typhoon C. thunderstorm D. tornadoes 4. The bike ___ is used at the circus has only one wheel. A. who B. which C. whose D. where 5. Please bring a raincoat just __ case. A. in B. at C. on D. to 11. The boy of_______ you made fun is my cousin. A. who B. whose C. whom D. that 12. It was the nurse _______ told me to come in. A. who B. whom C. whose D. that 13. I’m very busy, so please don’t disturb me _______ it’s urgent. A. while B. unless C. if D. since 14. I have always wanted to visit Kuala Lumpur, _______ capital of Malaysia. A. is the B. that is the C. which the D. the 15. I saw a thief take Mary’s purse so I ran _______ him but I couldn’t catch him. A. after B. over C. near D. into 16. We never find out the reason _______ Tom didn’t get that job. A. which B. that C. why D. how 17. There was a thunderstorm _______ the plane went on flying. A. and B. but C. so D. though 18. Which is the kind of language _______ is used by def and dump people. A. which B. that C. who D. Both A & B 19. In Australia, a tropical storm is known as a _______ A. hurricane B. tornado C. cyclone D. typhoon 20. The temple was destroyed in the violent _______ of 1470 BC. A. erupt B. eruption C. erupting D. erupts 21. Friends are people _______ close to us. A. who are B. who is C. which is D. which are 22. The building was _______ damaged by fire. A. extensive B. extent C. extension D. extensively 23. The man _______ opinions I respect most is my father. A. who B. whom C. whose D. that 24. Daddy, it’s the weather forecast _______ TV. A. in B. on C. to D. at 25. Don’t worry, everything is _______ control. A. under B. without C. in D. at 26. Please hurry. We need these documents _______ delay. A. under B. without C. in D. at 27. We thought the two films were very similar _______ a great extent. A. to B. with C. at D. in 28. Police officers don’t have to wear uniform when they are ______ duty. A. on B. in C. of D. off 29. Hue will have temperatures _______ 230 C and 270 C. A. at B. between C. in D. with 30. I am preparing for the picnic_______ my friends tomorrow. A. at B. to C. in D. with 31. Please bring some raincoats just_______ case. A. at B. in C. on D. to 32. This is the first time I _______ to play badminton. A. have tried B. am trying C. was trying D. would be try 33. It cost approximately 200 dollars. A. exactly B. at least C. mare than D. about 34. She occasionally visits her little country house. A. seldom B. rarely C. hardly ever D. now and then 35. The final _______ of the play will take place on Monday. A. action B. performance C. view D. sight 36. London is _______ of England. A. capital B. a capital C. an capital D. the capital 37. Our people live _______ than before the war. A. well B. the best C. as well D. better 38. She said that she _______ you some day. A. had visited B. has visited C. will visited D. would visit 39. He asked me How my brother was. “How _______ ?” He asked me A. is your brother B. your brother was C. your brother is D. was your brother 40. Lan will miss the bus ________ she hurry up A. if B. when C. why D. unless 41. Have you ever thought of an exciting trip to nowhere, a trip ________? A. to the world B. to the sea C. to space D. to the earth 42. If you decide to take the trip, you’ll have ________ a few months. A. to get willing B. to be hard C. to get ready D. to be unwilling 43. You should run a lot, swim everyday. You must be in excellent ________ condition. A. mental B. optional C. total D. physical 44. You must get a letter from the doctor that shows you are in perfect ________. A. health B. healthy C. healthful D. healthily 45. Once you get on the trip, you‘ll be in a different world. You’ll see ______ of the earth. A. photo B. posters C. pictures D. postcards 46. You may also find you country and other ________ places. A. interest B. interested C. interesting D. uninteresting 47. You will be able to see the wonders of ________ : oceans, rivers, mountains. A. nature B. structures C. buildings D. constructions 48. Pilots must know about the weather or they can’t land and________. A. take into B. get into C. take up D. take off 49. You ________ eat these mushrooms. They are poisonous. A. needn’t B. mustn’t C. can’t D. may not 50. If Ba _______ his lunch, he’ll be hungry at lunchtime. A. forgot B. can forget C. forgets D. forget
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4 tháng 3 2020

Choose the correct sentence (A, B, C or D) that has the same meaning to the given one.

Question 24. “Why don’t you use a password to protect your files?”, An said to me.

A:An encouraged me to using a password to protect my files.

B:An asked me why I didn’t use a password to protect my files.

C:An advised me to used a password to protect my files.

D:An advised me to use a password to protect your files.

4 tháng 3 2020

câu phải câu D đâu cậu, phải là my files chứ không phải your files, mình nghĩ câu này chọn B

các bạn làm giúp mình vs! I/chia động từ trong ngoặc 1. We(know)......................each other since we were in grade 4. 2.My mother (make).............a big cake for me next week. 3. Lan (not stay)....................at home yesterday morning. She went out with hẻ friends. 4. Jonh,you are late. The lesson (start)..............ten minutes ago II/VIẾT LẠI CÂU KHÔNG ĐỔI NGHĨA 1.Thí í the first time I have ever talked to a foreigner. =>I have never....... 2. We last...
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các bạn làm giúp mình vs!

I/chia động từ trong ngoặc

1. We(know)......................each other since we were in grade 4.

2.My mother (make).............a big cake for me next week.

3. Lan (not stay)....................at home yesterday morning. She went out with hẻ friends.

4. Jonh,you are late. The lesson (start)..............ten minutes ago

II/VIẾT LẠI CÂU KHÔNG ĐỔI NGHĨA

1.Thí í the first time I have ever talked to a foreigner.

=>I have never.......

2. We last saw Jack three dáy ago.

=>Jack hasn't.........

III/sắp xếp

1.. since/hasn't/to/ Lien/school/Tuesday/gone/.

2.you/ when /where/you/young/did/were/live/?

IV/put the verbs in blankets into a suitable tense.

1.My aunt and uncle (visit)................Tokyo last Tuesday

2...........................you ever..............................(be)to Pais,Mr Lam?

3.vinh usually (go)............to school on foot.

4 ................you(meet).....................Hoang and Phuong two day ago?

5.They (not open)........................................the shop on Saturdays and Sundays

6Nam(not do)......................................his homework yet.

7.Hơ often.................................you(do)................................the gardening?

8.Lien(talk)..................................on the phone to her pen pal.

1
7 tháng 3 2019

I/

1. have known

2. will make

3. didn't stay

4. started

II/

1. I have never talked to a foreigner before

2. Jack hasn't seen for three days

III/

1. Lien hans't gone to school since Tuesday

2. Where did you live when you were young ?

IV/

1. visited

2. Have you ever been

3. goes

4. Did you meet

5. don't open

6. hasn't done

7. do you do

8. is talking

1. Do you want to stop in this town, or shall we _______? A. turn on B. turn off C. go on D. look after 2. Who will ________ the children while you go out to work? A. look for B. look up C. look after D. look at 3. Please ________ the light, it’s getting dark here. A. turn on B. turn off C. turn over D. turn into 4. The nurse has to _________ the patients at the midnight. A. look after B. look up C. look at C. look for 5. There is an inflation. The prices __________. A. are going on B....
Đọc tiếp

1. Do you want to stop in this town, or shall we _______?

A. turn on B. turn off C. go on D. look after

2. Who will ________ the children while you go out to work?

A. look for B. look up C. look after D. look at

3. Please ________ the light, it’s getting dark here.

A. turn on B. turn off C. turn over D. turn into

4. The nurse has to _________ the patients at the midnight.

A. look after B. look up C. look at C. look for

5. There is an inflation. The prices __________.

A. are going on B. are going down C. are going over D. are going up

6. Remember to _______ your shoes when you are in a Japanese house.

A. take care B. take on C. take over D. take off

7. You can __________ the new words in the dictionary.

A. look for B. look after C. look up D. look at

8. It’s cold outside. __________ your coat.

A. Put on B. Put down C. Put off D. Put into

9. 15.If you want to be healthy, you should__________ your bad habits in your lifestyles.

A give up B call off C break down D get over

10. Never put off until tomorrow what you can do today.

A. do B. let C. delay D. leave

11. My father still hasn’t really recovered from the death of my mother.

A. looked after B. taken after C. gone off D. got over

12. The bomb exploded with a loud bang which could be heard all over the town.

A. went on B. went out C. went off D. went away

13. John, could you look after my handbag while I go out for a minute.

A. take part in B. take over C. take place D. take care of

14. Bill seems unhappy in his job because he doesn’t get _______ his boss.

A. up to B. on for C. on well with D. in with

15. Why do they ______ talking about money all the time?

A. keep on B. give up C. take after D. stop by

16. My father gave up smoking two years ago.

A. liked B. Continued C. stopped D. enjoyed

17. The government hopes to _________ its plans for introducing cable TV.

A. turn out B. carry out C. carry on D. keep on

18. When the tenants failed to pay their bill, the authorities decided to _____ the gas supply to the flat.

A. cut down B. cut out C. cut off D. cut up

19.You go on ahead and then I’ll catch _____ you.

A. along with B. forward to C. up with D. on to

1
2 tháng 3 2020

1. Do you want to stop in this town, or shall we _______?

A. turn on B. turn off C. go on D. look after

2. Who will ________ the children while you go out to work?

A. look for B. look up C. look after D. look at

3. Please ________ the light, it’s getting dark here.

A. turn on B. turn off C. turn over D. turn into

4. The nurse has to _________ the patients at the midnight.

A. look after B. look up C. look at C. look for

5. There is an inflation. The prices __________.

A. are going on B. are going down C. are going over D. are going up

6. Remember to _______ your shoes when you are in a Japanese house.

A. take care B. take on C. take over D. take off

7. You can __________ the new words in the dictionary.

A. look for B. look after C. look up D. look at

8. It’s cold outside. __________ your coat.

A. Put on B. Put down C. Put off D. Put into

9.15.If you want to be healthy, you should__________ your bad habits in your lifestyles.

A give up B call off C break down D get over

10. Never put off until tomorrow what you can do today.

A. do B. let C. delay D. leave

11. My father still hasn’t really recovered from the death of my mother.

A. looked after B. taken after C. gone off D. got over

12. The bomb exploded with a loud bang which could be heard all over the town.

A. went on B. went out C. went off D. went away

13. John, could you look after my handbag while I go out for a minute.

A. take part in B. take over C. take place D. take care of

14. Bill seems unhappy in his job because he doesn’t get _______ his boss.

A. up to B. on for C. on well with D. in with

15. Why do they ______ talking about money all the time?

A. keep on B. give up C. take after D. stop by

16. My father gave up smoking two years ago.

A. liked B. Continued C. stopped D. enjoyed

17. The government hopes to _________ its plans for introducing cable TV.

A. turn out B. carry out C. carry on D. keep on

18. When the tenants failed to pay their bill, the authorities decided to _____ the gas supply to the flat.

A. cut down B. cut out C. cut off D. cut up

19.You go on ahead and then I’ll catch _____ you.

A. along with B. forward to C. up with D. on to

10 tháng 3 2020

Bodies are made to be active! They are not designed for sitting in front of television, computer or reading magazines. Keeping fit doesn’t (23)____ that you have to be a super athlete to enjoy it and even a (24)___ exercise can give you a lot of fun. When you are fit and healthy, you will find you look better and feel better. You’ll (25)____ more energy and self-confidence. Physical exercise is very good (26)____ your body. People who take regular exercise are usually happier, more relaxed and more alert (27)____ people who sit around all day. Try an experiment - next time you’re in a bad mood, go for a walk or play a ball game, you will see doing some exercise greatly lift up your mood.
23. A. make B. define C. mean D. signify
24. A. few B. much C. no much D. little
25. A. boots B. spend C. discover D. accelerate
26. A. for B. across C. on D. with
27. A. as B. then C. than D. that

8 tháng 7 2019

b1 : Make up sentences using the words and phrases given .

1. Internet / change / way / we / communicate.

=>The Internet changes the way we communicate

2. I / email / my / pen pal / Australia.

=>I send emails to my pen pal in Australia.

3. do / think / spending / you / much / too / time / is / the / on / Internet / harmful ?

=>Do you think spending too much time on the Internet is harmful?

4. are / sides / the / positive / and / negative / what / of / the / Internet ?

=>What are the positive and negative sides of the Internet?

5. Internet / the / useful / is / , / but / also / it's / a / place / dangerous / .

=>Internet is useful but it's also a dangerous place.