Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
1. Find the word which has a different stress pattern from the other. Read the words aloud.
1. A. harvest B. famous C. design D. festival
2. A. holiday B. tradition C. vacation D. activity
3. A. outdoor B. colorful C. celebration D. movement
4. A. Monday B. flower C. occasion D. joyful
5. A. tourist B. event C. special D. national
6. A. music B. costume C. samba D. America
7. A. concert B. countryside C. concern D. lantern
8. A. surrounding B. manner C. stadium D. famous
9. A. Carnival B. party C. season D. parade
10. A. brighten B. Birthday C. delightful D. present
1. Find the word which has a different stress pattern from the other. Read the words aloud.
1. A. harvest B. famous C. design D. festival
2. A. holiday B. tradition C. vacation D. activity
3. A. outdoor B. colorful C. celebration D. movement
4. A. Monday B. flower C. occasion D. joyful
5. A. tourist B. event C. special D. national
6. A. music B. costume C. samba D. America
7. A. concert B. countryside C. concern D. lantern
8. A. surrounding B. manner C. stadium D. famous
9. A. Carnival B. party C. season D. parade
10. A. brighten B. Birthday C. delightful D. present
~~~Learn Well Đỗ Cửu Phi~~~
The president ... the prizes at the school sports day yesterday.
A. gave to. B. gave away.
C. gave for. D. gave up.
Bài làm:
Ta có: \(\frac{a}{b}=\frac{b}{c}\) => \(b^2=ac\)
Thay vào ta được: \(\frac{a^2+b^2}{b^2+c^2}=\frac{a^2+ac}{ac+c^2}=\frac{a\left(a+c\right)}{c\left(a+c\right)}=\frac{a}{c}\)
Vậy \(\frac{a}{c}=\frac{a^2+b^2}{b^2+c^2}\)
Đặt \(\frac{a}{b}=\frac{b}{c}=k\Rightarrow\hept{\begin{cases}a=kb\\b=kc\end{cases}}\Rightarrow a=k^2c\)
\(\frac{a^2+b^2}{b^2+c^2}=\frac{\left(k^2c\right)^2+\left(kc\right)^2}{\left(kb\right)^2+c^2}=\frac{k^4b^c+k^2c^2}{k^2b^2+c^2}=\frac{k^2\left(k^2b^2+c^2\right)}{k^2b^2+c^2}=k^2=\frac{a}{c}\)( đpcm )
What do you do after school? ......
Watch TV, play tennis, do the housework, take a shower then what do you do next? Read a book ? Have dinner? Do your homework? There is a lot of things you need to do or you want to do
Bye,<3
1. Minh used to ____________his homework late in the evening.
A. does B. do C. doing D. did
2. It is not _____________to pass the red traffic light.
A. dangerous B. safe C. safety D. danger
3. There are many _____________on the street: cars, buses, bikes, motorbikes…
A. vehicles B. transport C. engines D. machines
4. She spent all day _____________with her children.
A. play B. to play C. played D. playing
5. The central square is______________. It is full of people and noise.
A. quiet B. peaceful C. crowded D. calm
6. Your behavior is_______________. You should not be rude.
A. disappointing B. disappointed
C. disappoint D. disappoints
7. If we walk, we should go on the___________.
A. street B. pavement C. traffic light D. road
8. “One-way street”, “No parking” are___________.
A. road signs B. means of transport
C. traffic rules D. mistakes
9. He sings___________. Nobody wants to listen to his voice.
A. bad B. badly C. well D. good
10. He runs ___________than me.
A. more faster B. more fastly C. more fast D. faster
1. a 'havest b 'famous c de'sign
2. a 'monday b o'ccasion c 'flower
3. a e'vent b 'special c 'tourist
ĐA :1C
2B
3A