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Câu b:
- Gọi 3 số cần tìm là: a-2 ; a ; a+2
- Theo bài ra ta có:
- \(\left(a+2\right)^2-a\left(a-2\right)=334\\ \Leftrightarrow a^2+4a+4-a^2+2a=334\\ \Leftrightarrow6a=330\\ \Leftrightarrow a=55\)
- Vậy 3 số cần tìm là 53 ; 55 ; 57
It is hard to imagine life in modern society without smartphones. These handy little devices keep us entertained and enable us to manage important tasks on the go. Although smartphones feature powerful hardware, they wouldn’t be so useful without thousands of handy applications. Here are a few free and helpful apps that you can download to help you throughout the day.
If you have a habit of forgetting things and want to organize your life, give Evernote a try. It promises to help users remember everything. With a few clicks, you can send all of your photos, documents, and audio notes to Evernote. Then, your digital information can be stored in folders or tagged with useful keywords. When you need to access this data, you can perform a simple search and it will appear in seconds. Evernote is available on smartphones, tablets, and computers, so you can access your data from everywhere.
Imagine this scenario. You are watching a TV show and you hear a cool song in the background. You want to buy it but there is one problem. You don't know the name of the song. SoundHound is an app that will make this problem a thing of the past. It enables users to quickly identify songs by launching the app and holding their phone in the air. The app takes the song playing and compares it to thousands of other songs until it finds a match. Within seconds, it can tell you the name, artist, and album of the song you just heard.
Another spectacular app is Lookout. Hopefully, you won’t have to use it often, but when you do
need it. Lookout can be a lifesaver. Its main function is to help you find your phone if it goes missing. Lookout does this by using your smartphone’s data connection to locate your lost device. To see where your phone is on a map, simply log into Lookout from any web browser. In the worst-case situation, if someone steals your phone and you fear it has gone for good, you can wipe out all of its data with a few clicks. This will ensure no one will see any private information on your phone.
These helpful apps are just the tip of the iceberg. If you do some searching online, you are certain to find many other apps that will make your life more convenient.
Câu 18: Evernote can help you ______.
A. reduce your load of work thanks to its support B. access your data with a few useful keywords
C. organize your daily activities and remember things D. store only documents, texts, and contracts
Câu 19: Who would most enjoy SoundHound?
A. A person who always misplace things. B. Someone who knows the name to every song.
C. A person who enjoys discovering new music. D. Someone who is learning to play an instrument.
Câu 20: What could best replace the word “appear” in paragraph 2?
A. show up B. erase C. upgrade D. hide
Câu 21: What is Lookout most useful for?
A. Helping users change the appearance of their phones. B. Improving the speed of data connections.
C. Cleaning your phone when it has too much data. D. Locating phones when users can’t find them.
Câu 22: The word “it” in paragraph 4 refers to ______.
A. the app Lookout B. your smartphone C. your life D. a web browser
Câu 23: What does the author imply in the last paragraph?
A. Users should read the author’s website for more tips.
B. Users only need to use the apps included on their phone.
C. These are the most useful apps on the market.
D. People should try to find more apps on their own.
Câu 24: All of the following are true about the apps for your smartphone EXCEPT that ______.
A. they have a wide range from entertainment to daily activities
B. they can be used for various purposes
C. they were developed before the hardware of smartphones
D. they can make your life more comfortable and convenient
Câu 25: Which of the following statements does the author most probably agree with?
A. The app Lookout is most useful to the police.
B. The app SoundHound can save you a lot of time.
C. Lookout can replace Google Map to locate any location.
D. Evernote can offer you the treatment for your loss of memory.
It is hard to imagine life in modern society without smartphones. These handy little devices keep us entertained and enable us to manage important tasks on the go. Although smartphones feature powerful hardware, they wouldn’t be so useful without thousands of handy applications. Here are a few free and helpful apps that you can download to help you throughout the day.
If you have a habit of forgetting things and want to organize your life, give Evernote a try. It promises to help users remember everything. With a few clicks, you can send all of your photos, documents, and audio notes to Evernote. Then, your digital information can be stored in folders or tagged with useful keywords. When you need to access this data, you can perform a simple search and it will appear in seconds. Evernote is available on smartphones, tablets, and computers, so you can access your data from everywhere.
Imagine this scenario. You are watching a TV show and you hear a cool song in the background. You want to buy it but there is one problem. You don't know the name of the song. SoundHound is an app that will make this problem a thing of the past. It enables users to quickly identify songs by launching the app and holding their phone in the air. The app takes the song playing and compares it to thousands of other songs until it finds a match. Within seconds, it can tell you the name, artist, and album of the song you just heard.
Another spectacular app is Lookout. Hopefully, you won’t have to use it often, but when you do
need it. Lookout can be a lifesaver. Its main function is to help you find your phone if it goes missing. Lookout does this by using your smartphone’s data connection to locate your lost device. To see where your phone is on a map, simply log into Lookout from any web browser. In the worst-case situation, if someone steals your phone and you fear it has gone for good, you can wipe out all of its data with a few clicks. This will ensure no one will see any private information on your phone.
These helpful apps are just the tip of the iceberg. If you do some searching online, you are certain to find many other apps that will make your life more convenient.
Câu 18: Evernote can help you ______.
A. reduce your load of work thanks to its support B. access your data with a few useful keywords
C. organize your daily activities and remember things D. store only documents, texts, and contracts
Câu 19: Who would most enjoy SoundHound?
A. A person who always misplace things. B. Someone who knows the name to every song.
C. A person who enjoys discovering new music. D. Someone who is learning to play an instrument.
Câu 20: What could best replace the word “appear” in paragraph 2?
A. show up B. erase C. upgrade D. hide
Câu 21: What is Lookout most useful for?
A. Helping users change the appearance of their phones. B. Improving the speed of data connections.
C. Cleaning your phone when it has too much data. D. Locating phones when users can’t find them.
Câu 22: The word “it” in paragraph 4 refers to ______.
A. the app Lookout B. your smartphone C. your life D. a web browser
Câu 23: What does the author imply in the last paragraph?
A. Users should read the author’s website for more tips.
B. Users only need to use the apps included on their phone.
C. These are the most useful apps on the market.
D. People should try to find more apps on their own.
Câu 24: All of the following are true about the apps for your smartphone EXCEPT that ______.
A. they have a wide range from entertainment to daily activities
B. they can be used for various purposes
C. they were developed before the hardware of smartphones
D. they can make your life more comfortable and convenient
Câu 25: Which of the following statements does the author most probably agree with?
A. The app Lookout is most useful to the police.
B. The app SoundHound can save you a lot of time.
C. Lookout can replace Google Map to locate any location.
D. Evernote can offer you the treatment for your loss of memory.
choose the word abc or d that best fits each sentence
1. They are making a ______ , which gives people facts about the strange traditions in remote villages
A. DRAMA B COMEDY C. WEATHER FORECAST
D. DOCUMENTARY
2. If people were more ______ of the traffic law, there would be much fewer road accidents.
A. aware B. known C. serious D. knowledge
3. Jessica went to a ____ school for three years before she started acting in the first film
A. drama B. documentary C. comedy D. program
4. novadays tv viewers have different___ to choose : VTV1, VTV2, VTV3,HTV7, HTV9 and so on
A. films B. shows C. news D. channels
5. we thought the ___ on tv last night would be funny but it wasn't, it was really boring
A. tragedy B. comedy C. weather forecast D. news report
6. a television ___ show í a program in which competitors try to anser question to tes their knowledge
A. cartoon B. culture C. quiz D. drama
7. in the ___ examination, you have to talk to the teachers and answer a number of questions
A. oral B. aural C. visual D. written
8._____ warming is an impertant problem for many government
A. worldly B. global C. earthly D. international
9. we went back to our home village and had a very ____ weekend on the farm
A. enjoy B. enjoyed C. enjoyment D. enjoyable
10. Young children are easily influenced by the ___ on television
A. violent B. violence C. violently D. violate
SELECT THE SYNONYM OF THE FOLLOWING BOLD AND UNDERLINED WORD IN EACH SENTENCE IN THE UNIT
1/ The president escaped through a secret passage underneath the parliament buiding
a. answer b. hidden c. confidence d.basis
2/ which channel do you recommend to someone who likes animals
A. Suggest B. Tell C. speak D. Talk
3/ Documentary is a film or a radio or television program giving facts about something
A. Things B. Numbers C. truth D. news
4/ what types of the media are the most and the least important to you
A. successfull B. significant C. wonderfull D. attractive
5/ listen to the two radio news stories and check the right column under news story 1 and news story
a. honest b. honorable c. good d. precise
6/ television can make things more memorable because it presents information in a more effective way
a. clever b. expensive c. successfull d. pretty
7. some television programs may make people violent.
a. rapid b. insane C. extreme d. good
8. television also interferes with family life and communication
a. conflicts b. comes c. goes d. chats
9. i'm afraid you've made a mistake
a. wrongness b. error c. badness d. ugliness
10. it makes us aware of our global responsibilities
a. national b.worldly c. universal D.overall
select the antonym of the following bold and underlined word in each sentence in the unit
1/ the mass media has become one of the main instruments of political change
a. less b. fewer c. tiny d.small
2/ we ought to keep these proposals secret from the chairman for the time being
a. lively b.frequented c. accessible d. revealed
3. match the word in A with its appropriate definition in B
A. indirect b. illegal c. improper d. unreal
4. what program do you dislike watching and why not
a. fancy b. think c. imagine . d. want
5. what are the differences among types of the media
a. peace b. sameness c. likes d. need
6. heavy rain causes floods all over the country
a. light b. thin c. tiny d. trivial
7.television can make us passive
a. obtrusive b.enterprising c. hatefull d. unpleasant
8.it is an enjoyable way to relax
a. incorrect b. improper c. hateful d. unpleasant
9. we don't have to think so our brain becomes lazy
a. quick b. diligent c. hard d. good
10/ the council demolished it
a.make b. did or c ??? c. started d. construct
1.Nowadays, developing society should lead to many types of environmental pollution such as: land pollution, water pollution, thermal pollution, ...ect. Among them, noise pollution greatly affects people and animals life. Noise pollutions happen when the sound's loudness is more than 70 dBs. Sound of vehicles is the cause of noise pollution or turning on the music too loudly also affects the hearing of people around, especially in bars, concerts, or karaoke bars. If you experience noise pollution for a long time, you can have headache, high blood pressure and hearing loss, ect. Some tips to reduce noise pollution. For examples, wearing earplugs when you go to concerts or other loud events. Listening to music through headphones or headsets at safe levels. I hope noise pollution will decrease in the future.