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sangle061
2 năm trước
Cho tam giác ABC cân tại A, AI là đường phân giác (I thuộc BC). a) Chứng minh: tam giác ABI = tam giác ACI. b) Chứng minh: AI là đường trung tuyến của tam giác ABC. c) Gọi G là trọng tâm của tam giác ABC. Tính AG biết AI = 9cm. d) Kẻ BK vuông góc AC (K thuộc AC) cắt AI tại H. Chứng minh CH vuông góc AB Giúp mới vs mới sẽ vote 5 sao cho
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1. “It’s so stuffy in here.” – “ _______ ” A. Do I have to open the window? B. Must I open the window? C. Shall I open the window? D. Would you like to open the window ? 2. “Merry Christmas!” – “ ______” A. Happy Christmas to you! B. Same for you! C. The same to you! D. You are the same! 3. “I will pick you up around 7:30. The movie starts at 8:00.” – “ ______ ” A. No, you don’t. B. OK. See you then. C. I don’t like waiting. D. Thanks, no big deal. 4. “ ______ going on a picnic this weekend?” – “That’s great!” A. How about B. Let’s C. Why don’t we D. Would you like 5. “Mr Green had an accident. He’s been in hospital for a week.” – “ _______ ” A. How terrific. B.Oh, is he? C. Poor it. D.Poor him. 6. “Do you really think that I should take the job?” – “ _______ Trust me. Take it. What do you have to lose?” A. I doubt so. B. I don’t think so. C. I hope so. D. I know so. 7. “Do you fancy a drink?” – “_____ ” A. No, everything is OK. B. Oh! Of course not. C. Sure, let’s go and get one. D. Wow! I am so excited. 8. “What are you doing here, Tom? Do you want to join us?” – “ ________ Please continue. I’m just Corning to fmd my stuff.” A. Don’t mind me. B. Don’t worry. C. Not at all. D. Not to mention. 9. “Take the second turning on the left and then go straight ahead until you see the cinema on the right.” – “ _______ Thanlcs.” A. I agree with you. B. I don’t think so. C. I have got that. D. It makes sense. 10. “Do you mind if I turn on the volume?” – “ ______ ” . A. I don’t think so. B. I’m sorry, but you have to. C. No, please go ahead. D. Of course, you can’t. 11. “Would you mind if I smoked?” – “ _______ ” A. Don’t mention it. B. I’d rather you didn’t. C. Mind your head! D. You don’t want to. 12. “Let’s have a pizza.” – “ _______ ” A. It doesn’t matter. B. Not at all. C. Not really. D. Sure thing! 13. “It’s freezing outside! What happened to the weather report? I thought this cold front was supposed to pass.” – “Yeah, _______ ” A. I agreed with you. B. I thought so too. C. That’s good point. D. You are right. 14. “Let’s play Scrabble! I’m really good at spelling, too!” – “Oh, yeah?__________ ” A. Does that make sense? B. I can’t believe in that. C. I worry about it. D. We’ll see about that! 15. ‘I’m really excited for Aunt Mary’s surprise birthday party this afternoon! Aren t you?” – ______ ” A. Oh! I didn’t know she was older. B. Really? What happened next? C. Uh-huh! What then? D. Yeah! How old is she?

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