I ............ to my hometown by coach last weekend
A.go B.goes C.went D.going
K
Khách
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21 tháng 1
Ta có tính chất: \(\dfrac{a}{b}< \dfrac{a+m}{b+m}\)
\(N=\dfrac{10^{20}+1}{10^{21}+1}< \dfrac{10^{20}+1+9}{10^{21}+1+9}\)
\(\Rightarrow N< \dfrac{10^{20}+10}{10^{21}+10}\)
\(\Rightarrow N< \dfrac{10\left(10^{19}+1\right)}{10\left(10^{20}+1\right)}\)
\(\Rightarrow N< \dfrac{10^{19}+1}{10^{20}+1}\)
\(\Rightarrow N< M\)
21 tháng 1
Đổi: \(S_{ADC}=7m^2=700cm^2\)
\(S_{ADC}=\dfrac{1}{2}\times CD\times AH\)
\(AH=\dfrac{2\times S_{ADC}}{CD}=\dfrac{2\times700}{18}=\dfrac{700}{9}\left(cm\right)\)
\(S_{ABCD}=\dfrac{\left(AB+CD\right)}{2}\times AH=\dfrac{\left(12+18\right)}{2}\times\dfrac{700}{9}=\dfrac{3500}{3}\left(cm^2\right)\)
PC
1
21 tháng 1
Ta có tính chất: \(\dfrac{a}{b}>\dfrac{a-m}{b-m}\)
\(A=\dfrac{2022^{99}-1}{2022^{100}-1}>\dfrac{2022^{99}-1-2021}{2022^{100}-1-2021}\)
\(A>\dfrac{2022^{99}-2022}{2022^{100}-2022}\)
\(A>\dfrac{2022\left(2022^{98}-1\right)}{2022\left(2022^{99}-1\right)}\)
\(A>\dfrac{2022^{98}-1}{2022^{99}-1}\)
\(A>B\)
S
24 tháng 1
1. Cyclist and motorist have to wear a C. helmet when they ride a motorbike.
2. He forgot to give a B. signal before he turned left and got a ticket.
3. All of us have to obey B. traffic rules strictly.
4. We should wait for the traffic lights C. to turn green before we cross the street.
5. Drivers have to B. fasten your seatbelt whenever they drive.
6. We should D. walk across the street at the zebra crossing.
7. C. How far is it from your house to the nearest bus stop?” – “about 50 metres”.
8. Linh used to A. do jigsaw puzzles in his spare time.
9. Public C. transport in this city is quite good, and it’s not expensive.
10. I B. used to play marbles when I was young, but now I didn’t.
11. There B. used to have a bus station in the city centre, but it has been moved to the suburbs.
12. C. How long does it take to go from Ha Noi to Ho Chi Minh City by plane?
13. Minh used to A. do his homework late in the evening.
14. If people C. obey the rules, there are no more accidents.
15. You should B. look right and left when you go across the road.
16. Hurry up or we can’t D. catch the last bus home.
17. Lan used to go to school D. by bus
18. Public D. transport in my town is good and cheap.
19. When there is a traffic jam, it A. takes me a very long time to go home.
20. Yesterday Rick and Peter C. cycled round West Lake. It took them an hour.
C
went