Tham khảo
Chiều rộng `HHCN` là:
`25.\frac{3}{5}=15(m)`
Chiều cao `HHCN` là:
`\frac{25+15}{2}=20(m)`
Thể tích `HHCN` là:
`25.15.20=7500(m^3)=7,5dm^3=7,5 l`
`\text{©CBT}`
Chiều rộng là:
25×$\frac{3}{5}$ =15 (cm)
Chiều cao là:
(25+15)÷2=20 (cm)
Thùng đang chứa số lít nước là:
15×25×20=7500 (cm³)
Đổi 7500 cm³=7,5 dm³=7,5 lít nước
Cho mình xin hay nhất
II. Choose the best one (A, B, C or D) to complete the sentence. 5.The government has launched a ______ campaign to reduce the number of road accidents A. rout safety B. road safety C. way safe D. lane safe 6.This campaign focused on young road ______ and aimed to raise their about the serious impact of road traffic injuries. A. users-awareness B. using-aware C. users-awaring D. drivers-awareness 7.People need to be aware that the ______ limit must be obeyed on that route. A. speedy B. speeding C. speediness D. speed 8.A driver’s ______ is an official document permitting a specific individual to operate one or more types of motorized vehicles. A. permission B. paper C. license D. certificate 9.Before you drive away, always fasten your seat belt and make ______ all your passengers wear the seat belt correctly. A. calm B. sure C. certain D. guard 10.Now people who drive with children under 8 years old without putting them in safety seats can be ______ up to $25. A. fined B. paid C. punished D. handed in 11. You will be fined if you get ______ when driving. A. drinking B. drink C. drunk D. drinked 12.We are running ______ gas, so we need to stop before we get on the highway. A. out of B. in C. out D. down 13. Not wearing a helmet when driving a motorbike is ______ the traffic laws. A. broken B. break C. breaking D. broke 14. It took me 2 hours ______ my bike to school because of traffic jam. A. to ride B. to drive C. riding D. to rode 15. The vehicles queue around the city during the evening ______. A. rush hour B. traffic hour C. peak hour D. both A and C 16.People have to follow the traffic ______ on public streets. A. regulations B. regulars C. definitions D. conditions 17.We should ______ people to use public transport instead of their personal vehicles. A. courage B. encourage C. say D. show 18. More people own ______ cars and it makes the traffic jams problem become worse. A. public B. his C. private D. common
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Finish each of the following sentences in such a way that it means exactly the same. 1. Does your class have twenty-five students? Are there………………………………………………………………? 2. Mr. Minh has a daughter, Lan. Mr. Minh is…………………………………………………………….? 3. That book belongs to Nam. That is………………………………………………………………….? 4. What is the price of a cake? How much…………………….....................................? 5. How much time do you spend learning English every day? How long does …………………………………………………..….? 6. Apple juice is her favorite drink. She ................................................................................................ 7. How much is this hat.? What ..........................................................................................................? 8. Are there many students in your class? Does ………..……………………………….?
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Cho tam giác ABC vuông tại A, AD là đường cao, đường phân giác góc B cắt AD; AC lần lượt tại F và E. Chứng minh rằng: a) ∆BAF ∾ ∆BCE b, DF/AF=AE/EC
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