Đáp án:
Giải thích các bước giải:
Ta có :
Tam giác ABC nội tiếp (O) đường kính BC
=> ∠BAC=90"
Mà ∠HEA=∠HFA=90"
=> tứ giác AEHF là hình chữ nhật ( tứ giác có 3 góc =90")
Choose the word whose stress pattern is differently from the others. 10.A.damage B.event C.behave D.surprise 11. A. happy B. allow C. career D. trainee 12. A. answer B. listen C. prefer D. happen 13. A. listen B. happen C. begin D. answer
Exercise 3: Choose the best answer that best fits meaning the sentence or is the passage sentences of the root one. 1. The cold weather damaged the plants. A. The plants were damaged by the cold weather. B. The plants was damaged by the cold weather. C. The plants are damaged by the cold weather. D. The plants is damaged by the cold weather. 2. They were doing the bedroom on Friday. A. The bedroom were being done on Friday. B. The bedroom is done on Friday C. The bedroom was being done on Friday D. The bedroom are done on Friday 3. They’re painting the living room now. A. The living room is painting now. B. The living room is painted now. C. The living room is being painting now. D. The living room is being painted now. 4. Martha was delivering the documents to the department. A. The documents was being delivered to the department by Martha. B. The documents was delivered to the department by Martha. C. The documents was being delivering to the department by Martha. D. The documents is being delivered to the department by Martha. 5. The mayor is going to open a new airport. A. A new airport is going to opened by the mayor. B. A new airport is going to open by the mayor C. A new airport is going to be opened by the mayor D. A new airport is going to be open by the mayor
Biểu thức `x-2` nhận giá trị âm `=>|x-2|=?` `x-2` nhận giá trị dương `=>|x-2|=?`
Ai giúp mình với ạ cảm ơn MN trc
Giúp e vs 5 sao + tnhn+ cảm ơn cho mn
Choose the best option to complete each of the following sentences. 1.When she__________home, her husband__________after the children last night. A.came/looked B.was coming/ looked C.came/was looking D.was coming/ was looking 2.His lecture was so________that nobody wanted to listen to it. A.boring B.bore C.boringly D.bored 3. When I got to the station, my pen pal ……………………. for me. A. had waited B. was waiting C. were waiting D. waited 4. My mother can’t stand …………………….me at home all day. A. to see B. see C. being seen D. seeing 5. Please _________ your seatbelt. The plane is taking off. A. fast B. fasten C. fastly D. faster 6. John is studying hard. He doesn’t want to fail the next exam. A. John is studying hard in order not to fail the next exam. B. John is studying hard in order that he not fail the next exam. C. John is studying hard so as to fail the next exam. D. John is studying hard in order to not to fail the next exam. 7. We wanted to stop ____some gifts, but we didn’t have enough time. A. buying B. to buy C. buy D. being bought 8. My son insists on having a package tour to Singapore ____ the high cost. A. Although B. despite C. Because of D. as 9. In the near future,a teacher will act more like a(n)…………..than a giver of knowledge A.instructor B. facilitator C.speaker D.listener
cho parabol y= x^2 và đường thẳng 9(d) :y=ax+3 a, chứng minh rằng (d) luôn cắt (P) tại hai điểm phân biệt
Giúp mk với Mk cần gấp Nhớ phải làm đúng và nhanh
💞Vẽ hình dưới,yêu cầu có màu,lâu cx đc nhưng vẽ phải đẹp😌 N/l:tui mà có đồ ăn như này chắc một miếng là hết luôn🙂,sắp gãy tay vì đặt quá nhiều câu òi
Xác định các chất và hoàn thành các dãy biến hóa sau : A + B → C + H₂⇧ C + Cl₂ →D D + NaOH →E⇩ + F E →Fe₂O₃ + H₂O
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