Cho hình chữ nhật ABCD. Qua B kẻ đường thẳng vuông góc với đường chéo AC tại H. Gọi E, F, G theo thứ tự là trung điểm của AH, BH, CD. 1) Chứng minh tứ giác EFCG là hình bình hành. 2) Chứng minh BEG=90° 3) Cho biết BH=H, góc BAC=a. Tính S của ABCD theo h và a. 4) Tính độ dài đường chéo AC theo h và a

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Tìm lỗi sai nhé : 1. It's no use asking themkeep quiet. 2. This text is too long for me to read it. 3. I can't get used to doingso difficult exercises. 4. My father doesn't know speak English. 5. She behaves as if she was a baby. 6. You wanted me to tellyou about what I was doinghere and how was my life. 7. The course is good, but more hard than I thought. 8. Sleepingall day, to eat too much and nevergoing out is unhealthy. 9. The dentist gave me a check upand then

1. This/ be/ first/ time/ I/ write/ lover. 2. Her father/ work/ engineer/ since 1990. 3. He/ able/ drive/ since/ 18. 4. You/ visit/ Buckingham Palace/ yet? 5. It/ most enjoyable/ concert/ they/ ever/ be. 6. I/ never/ taste/ such/ delicious cake. 7. It/ the first time/ I/ ride/ camel. 8. Since/ his wife/ die/ 1978/ Charles/ live/ alone. 9. They/ send/ text messages/ friends/ yet? 10. This/ best/ party/ I/ ever/ be to.

1 Complete the text with availabled words since yet had already ago for have already never ever I (1) .....always been very fit and healthy, and I have (2) ........ had a serious illness However, a couple of weeks (3)........., I caught the flu. I must admit that until then, I had not realized just how unplreasant the could be. I (4) ...... a high temperature for nearly a week , and my whole body hurt . I don't think I have (5) ....... felt so miserable . It's taking me ages to get my strength back. It really bothersome that I haven't had enough energy to play football (6) ..... I go till. In fact, I have (7) ...... been to the doctor to ask if it's normal to feel weak for so long. He says I'll soon feel better. Apparently I'm lucky . For some people , especially the old and the weak, the flu can be very serious. doctors have tried (8) ....... years to find a cure for the flu , but they haven't found one (9) ...... Fortunately, researchers have developed a vaccine which gives effective protection against the disease According to my doctor ,most of his elderly patients have (10) ..... received their flu shots

Cần gấp ạ, em ms học kiến thức lớp 9 nên làm đầy đủ, chi tiết, dễ hiểu nhất nhé em cảm ơn trc ạ (1)

8. He had a _______________ action to save his family. (hero) 9. She listens to classical music for _______________. (relax) 10. We have great _______________ for what he’s done. (admire) 11. She spends the morning doing some _______________. (sightsee) 12. Children like to share their interests and _______________ with their parents. (enjoy) 13. Most of the _______________ have lived here all their life. (village) 14. We have lived in a hotel with a _______________ atmosphere. (rest) 15. This stamp is quite rare and is almost a _______________’s item. (collect) 16. Our friends are very interested in visiting some _______________ resorts.(mountain) 17. There is no flour left. Will you go to the _______________ store to buy some? (grocer) 18. We have to leave the party_______________ or we’ll miss the train. (hurry) 19. Most students go _______________ when they have a Sunday off. (picnic) 20. I find this piece of music very _______________. (rest) Giải giúp mik nhé! Mik báo tốt cho, đang cần gấp

Một hợp chất hóa học được tạo thành từ kim loại hóa trị II và phi kim hóa trị I.Hòa tan 9,2g hợp chất này vào nước để có 100ml dung dịch.Chia dd này thành 2 phần bằng nhau.Thêm một lượng dư AgNO3 vào phần 1,thấy tạo ra 9,4g kết tủa.Thêm một lượng dư dd Na2CO3 vào phần 2,thu được 2,1g kết tủa a/Tìm CTHH của hợp chất trên b/Tính nồng độ mol/l của dd đã pha chế

A .Match each job with the appropriate picture 1.________ a teacher 2.________a singer 3.________a doctor 4.________a taxi driver 5.________ a shop assistant 6.________a worker

Mọi người giúp em với ạ: Viết 1 đoạn văn trình bày suy nghĩ của em về ý nghĩa của những cống hiến thầm lặng.Trong đoạn văn có sử dụng 1 câu hỏi tu từ và gạch chân nó