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1,He verry ............. He has a lot of friends
2,We live in a .........................
3,There is big ................... in her bedroom ( 3 câu này mình ko có bảng thì không làm được )
2.Điền dạng đúng của động từ trong ngoặc vào chỗ chấm
1,They (watch)...are watching.................TV now
2,Ha(not do)......isn't doing.......... Homework now
3,They(live) .........live........ in town house
4,He(not,play)..........isn't playing........a game.He is writing an email to his friend
5,She(watch) ...watches...............TV everyday
Bài tập 1 : Điền dạng đúng của từ trong ngoặc (danh-tính –động- trạng)
1. My mom enjoys cooking on a gas...........cooker..................... (cook)
2. There is a lot of food and drink on the .................dining.............. table. (dine)
3. Her father is a.............farmer................... (farm)
4. His ……feet………….are small and long. (foot)
5. Near my house there is a market. It’s very ……noisy……………… (noise)
6. Her …………children……..are in the yard. They are playing soccer. (child)
7. There are many…………trees……………….on the street. (tree)
8. In the …………neighborhood…..... , there is a museum, a factory and a stadium. (neighbor)
9. The photocopy is between the ……bakery………….and the drugstore. (bake)
10. Minh is ..... ............better............... at English than I am. (good)
Câu 1: cooker ở đây nghĩa là bếp nhé
Câu 2: dining table: bàn ăn
Câu 3: sau mạo từ a dùng danh từ, farmer ở đây nghĩa là nông dân
Câu 4: đằng sau là are => chủ ngữ số nhiều, số nhiều của foot là feet
Câu 5 tính từ của noise là noisy : ồn ào
Câu 6: đằng sau là are => số nhiều, số nhiều của child là children
Câu 7: sau many + danh từ số nhiều
Câu 8: neighborhood: khu lân cận
Câu 9: bakery: tiệm bánh mì
Câu 10: có than => so sánh hơn,
1. The beef is. .on..... the table, ..between.... the chicken and the vegetables.
Điền dạng đúng với đt trong ngoặc
1. In our ...neighborhood.., there is a post office and a supermarket. (neighbor)
2. Nam is the ..best... student in our class.(good)
3.Their ..children... are in the bookstore. (child)
Điền giới từ:
1. The beef is on the table in the kitchen and the vegetables.
Điền dạng đúng với động từ trong ngoặc.
1. In our neighborhood, there is a post office and a supermarket.(neighbor).
2. Nam is the best student in our class. (good)
3. Their childrens are in the bookstore. (child)
1. Air pollution can make people unhealthy.
2. The carth's climate in becoming warmer.
3. Of the there rooms, the biggest one in mine.
4. I like drinking fruite juice, especially lemonade.
5. There is a variety of fruits in Vietnam.
6. Environmental pollution is being considered to be a great global problem.
8. I understand perfectly what you are saying.
9. My grandparents live healthy at the age of 80.
10. Pollution is a problem in many big cities.
1. polltion
2.warmer
3.biggest
4.lemonade
5.variety
6.environmental
7.richness
8.perfectly
9.healthily
10.pollution,cities
1 more interesting
2 older
3 larger
4 more colorful
5 quieter
6 more boring
7 bigger
8 worse
9 more beautiful
10 better
#\(Cụt cạp cạp\)
#\(yGLinh\)
1. Traveling in winter is more interesting than in summer.
2. Lana is older than John.
3. China is far larger than the UK.
4. My garden is a lot more colorful than this park.
5. Helen is quieter than her sister.
6. My Geography class is more boring than my Math class.
7. My class is bigger than yours.
8. The weather this autumn is even worse than last autumn.
9. This box is more beautiful than that one.
10. A holiday by the mountains is better than a holiday by the sea.
1. He was the ( clever ) most clever thief of all.
2. My Latin class is ( boring ) more boring than my English class.
3. My garden is a lot ( colourful ) more colorful than this park.
4. Table tennis is easier than tennis, but badminton is the easiest ( easy )
5. No, I don't think so ! Romantic films are the most boring films I have ever seen. ( boring )
6. A mouse is as clever as a hamster, but a rat is more clever than a mouse. ( clever )
7. A canary is more colorful than an eagle, but a parrot is the most colorful bird. ( colourful )
8. They live in a ( beautiful ) beautiful house.
9. Susan is a ( nice ) nice girl.
10. Doris reads ( many ) more books than Peter, but Frank reads the most ( many )
11. They live in a ( big ) big house, but Fred lives in a ( big ) bigger one.
1 . There is a large varity of animals that live in Nairobi National Park .
đang chờ ý kiến đóng góp
\(\sqrt{x^2-2m}+2.\sqrt{x^2-1}=x\ge0\)
đkxd: \(x^2\ge2m,1\)
Ta có: \(\sqrt{x^2-2m}+2.\sqrt{x^2-1}=x< =>\text{}\text{}\text{}2.\sqrt{x^2-1}=x-\sqrt{x^2-2m}\)
=>\(4.\left(x^2-1\right)=\left(x-\sqrt{x^2-2m}\right)^2\)và \(x-\sqrt{x^2-2m}\ge0< =>x\ge\sqrt{x^2-2m}< =>m\ge0\)
<=>\(4x^2-4=x^2-2x.\sqrt{x^2-2m}+x^2-2m\)
<=>\(2x^2+2m-4=-2x.\sqrt{x^2-2m}\)
<=>\(x^2+m-2=-x.\sqrt{x^2-2m}\)
=>\(\left(x^2+m-2\right)^2=\left(-x\sqrt{x^2-2m}\right)^2\)và \(x^2+m-2\ge0\)
<=>\(x^4+2.\left(m-2\right)x^2+\left(m-2\right)^2=x^4-2m.x^2\)
<=>\(\left(4m-4\right)x^2=-\left(m-2\right)^2\)
-xét m=1=>pt<=>0.x^2=-1(vô lí, loại)
-xét m khác 1
=>\(x^2=\frac{-\left(m-2\right)^2}{4m-4}\)
+Với m>1=>\(x^2=\frac{-\left(m-2\right)^2}{4m-4}< 0\)(vô lí, loại)
+Với 0<_m<1=>\(x^2=\frac{-\left(m-2\right)^2}{4m-4}>0< =>\orbr{\begin{cases}x=-\sqrt{\frac{-\left(m-2\right)^2}{4m-4}}\\x=\sqrt{\frac{-\left(m-2\right)^2}{4m-4}}\end{cases}}\)
Theo điều kiện xác định=>x^2>_1,2m và x^2>_2-m
=>\(\hept{\begin{cases}\frac{-\left(m-2\right)^2}{4m-4}\ge1\\\frac{-\left(m-2\right)^2}{4m-4}\ge2m\end{cases}and\frac{-\left(m-2\right)^2}{4m-4}\ge2-m}< =>\hept{\begin{cases}\frac{\left(m-2\right)^2}{4-4m}\ge1\\\frac{\left(m-2\right)^2}{4-4m}\ge2m\end{cases}and\frac{\left(m-2\right)^2}{4-4m}\ge2-m}\)Vì 4-4m>0=>\(\hept{\begin{cases}\left(m-2\right)^2\ge4-4m\\\left(m-2\right)^2\ge2m\left(4-4m\right)\end{cases}and\left(m-2\right)^2\ge\left(4-4m\right)\left(2-m\right)< =>\hept{\begin{cases}m^2\ge0\\\left(3m-2\right)^2\ge0\end{cases}}}\)và 2/3<_m<_2
Do đó để pt có nghiệm thì 2/3<_m<1