trong hình vẽ,muốn dùng một lực nhỏ hơn trọng lực của vật để nâng lên,cần tạc dụng lực vào đòn bẩy ở: A: điểm A B: điểm B C: điểm O D:điểm A hoặc B

Những giải pháp nào để hạn chế sự phụ thuộc vào điều kiện tự nhiên trong sản xuất nông nghiệp

Cho tam giác ABC với AB=4cm, BC= 5 cm. Tính độ dài AC. Trên tia đối tia AB lấy điểm D sao cho AB=AD. Chứng minh tam giác ABC= tam giác ADC, từ đó suy ra tam giác BCD cân. Trên AC lấy điểm E sao cho AE = 1/3 AC. Chứng minh DE đi qua trung điểm I của BC.

Câu 4: Em có nhận xét gì về xã hội nước ta thời kì bị đô hộ có 5 tầng lớp bao gồm : Quan lại đô hộ, hào trưởng Việt, Địa chủ Hán, Nông dân cong xã, nông dân lệ thuộc và nô tì A. Không có sự phân hóa B. Có sự phân hóa nhưng không đáng kể C. Tiếp tục bị phân hóa và phân hóa sâu sắc hơn D. Mới bắt đầu có sự phân hóa

1 HÌNH HỘP CHỮ NHẬT CÓ CHIỀU CAO 8 DM CHIỀU DÀI HƠN CHIỀU RỘNG 8DM CHIỀU ROỌNG BẰNG 5 PHẦN 4 CHIỀU CAO TÍNH DT XUNG QUANH CỦA HÌNH CHỮ NHẬT

Cho tam giác ABC có BD là đường phân giác aAB = 8 cm AC = 6 cm BC = 10 cm hỏi độ dài cạnh DA và DC bằng bao nhiêu

Tính diện tích xung quanh và diện tích toàn phần của hình hộp chữ nhật có: a) Chiều dài 2,5m, chiều rộng 1,1m và chiều cao 0,5m. b) Chiều dài 3m, chiều rộng 15dm và chiều cao 9dm. giúp mình nha ω

1. When I last saw him, he _____________________ in London. A. has lived B. is living C. was living D. has been living 2. We ____________________________ Dorothy since last Saturday. A. don’t see B. haven’t seen C. didn’t see D. hadn’t seen 3. The train ______________________ half an hour ago. A. has been leaving B. left C. has left D. had left 4. Jack ______________________ the door. A. has just painted B. paint C. will have painted D. painting 5. My sister _____________________ for you since yesterday. A. is looking B. was looking C. has been looking D. looked 6. I ___________________ Texas State University now. A. am attending B. attend C. was attending D. attended 7. He has been selling motorbikes ________. A. ten years ago B. since ten years C. for ten years ago D. for ten years 8. Christopher Columbus __________________ American more than 500 years ago. A. discovered B. has discovered C. had discovered D. had been discovering 9. He fell down when he ________________ towards the church. A. run B. runs C. was running D. had run 10. We ___________________ there when our father died. A. still lived B. lived still C. was still lived D. was still living 11. They ______ table tennis when their father comes back home. A. will play B. will be playing C. play D. would play 12. By Christmas, I ___________________ for Mr. Smith for six years. A. will have been working B. will work C. have been working D. will be working 13. I ____________________ in the room right now A. am being B. was being C. have been being D. am 14. I ____________________ to New York three times this year. A. have been B. was C. were D. had been 15. I’ll come and see you before I ___________________ for the States. A. leave B. will leave C. have left D. shall leave

https://img.hoidap247.com/picture/question/20200423/tini_1587648789983.jpg

Đọc đoạn văn và khoanh tròn Simple Ways to Lose Weight on a Budget Plan to Cook at Home Instead of buying costly prepared meals, which often tend to be high in calories, cook your own at home. Plan out your meals with high-fiber foods like beans and whole grains which will keep you full and are a cheaper, healthier alternative to rich proteins and more processed grains. Eat Less Eating less leads to weight loss, and cost savings, especially if you cut down on the right things. Start by cutting your portions of pricy meat and poultry. Double Up on Vegetables Vegetables are great for weight loss, as well as all-around health. They are low in calories and high in water and fiber - two things that keep you feeling full. Save cash by shopping for those that are in season. Frozen vegetables can be a great bargain, with just as much nutrition as fresh, since they are picked and frozen at their peak ripeness. Get Creative with Your Exercise Options You don’t need to shell out a monthly gym fee to get moving. Instead, find fun activities you enjoy for free. If you’re just getting started with a regular exercise routine, try your beginning with daily walks: start slowly and build up time and speed. Make Friends with Someone One of the most powerful resources you have for helping you lose weight is your social network. Find a friend who is also trying to lose weight and agree to help each other stay motivated. One study found that when friends participated in a group weight-loss programme together, they lost more weight than people who did the same programme on their own. 11. The advantage of cooking at home is ……….. A.to have food that is high in calories B.to enjoy a variety of rich proteins and more processed grains C. to plan out your costly prepared meals D. to choose foods that keep you full and is cheaper 12. In order to cut down on your daily calories, you should do all the following things EXCEPT …………. A. follow vegetarian diets for your meals B. eat less meat and poultry C. eat more beans, lentils, tofu and eggs D. cut down on animal proteins for some of your meals 13. All of the following are true about vegetables EXCEPT that ………. A. vegetables can keep you feeling full B. they help you lose weight effectively C. frozen vegetables are not good for your health D. you feel healthier and save money with fresh vegetables in season 14. We can infer from the article that …………. A.you should join in a social network instead of going to a gym B.a partner can make you feel more motivated in losing weight C. you should find fun activities at the gym and follow them D. joining a programme you can lose more weight than your partner 15. The phrase “shell out” is closest in meaning to…………. A. become more interested in something B. pay money for something C. peel something out D. take someone out of a shell