Cho hình thang cần ABCD, có đáy nhỏ AB, đáy lớn CD, Đường cao BH biết AB+CD=2BH Chứng minh AC vuông BD Pls hứa vote 5 sao và ctlhn

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Xin nhờ mọi người giúp đỡ em ạ Em chân thành cảm ơn mọi người nhiều lắm ạ 😘😘😘😘😘😘😘 VI. Read the passage and choose one correct answer for each question. ​Smoking causes lung cancer, which is the number one cancer among men. Ninety percent of the people who get lung cancer die. Smoking is also the leading cause of mouth cancer, tongue cancer, and throat cancer. ​Many smokers have heart disease and pneumonia. Smoking causes about one million early deaths in the world every year. ​Smokers not only harm themselves but also harm others. Smokers breathe smoke out into the air. They breathe it out on their children and on their wives or husbands. Children whose parents smoke have more breathing and lung problems than other children. Women who are married to smokers are more likely to have lung cancer than those married to non-smokers. We are all aware that smoking is bad. So why do people smoke? 1. The number one cancer among men is ______. A. throat cancer ​​B. lung cancer ​C. mouth cancer ​D. tongue cancer 2. The main cause of mouth cancer, tongue cancer and throat cancer is ______. A. overeating ​​​B. smoking ​​C. breathing ​​D. drinking 3. Every year, smoking causes about one million ______. A. early deaths ​​B. cancer patients ​C. injured men ​D. killing diseases 4. The word “it” in the passage refers to ______. A. smoke ​​​B. breath ​​C. cancer ​​D. air 5. Who are more likely to have lung cancer and lung problems? A. People who live with non-smokers. ​​B. People who live in the country. C. People who live in the city.​​ ​D. People who live with smokers.

Em xin nhờ mọi người giúp em ạ Em cảm ơn mọi người nhiều lắm ạ 😊😊😊😊😊😊 IV. Error correction: 1. It spent me 30 minutes to clean the door. A B ​ C D 2. We spent a long time to travel to the skiing resort, but in the end we got there. A ​​ B ​ ​ C ​​ D 3. They could publish his new English - Vietnamese dictionary next month. A B C D 4. When they will pay me for the decoration, I will have enough money to buy a car. A B​ C​​​ D 5. Peter and Tom plays tennis every afternoon with Mary and me ​​ A B C D V. Read the following passage carefully and then choose the best option to fit each space. SAVE THE EARTH! ​​We are all slowly (1)_____​the Earth. The seas and rivers are too dirty to swim in. There is so much smoke in the air that it is unhealthy to live in many of the world's cities. In one well-known city, for example, poisonous gases (2) ____ cars pollute the air so much that traffic policemen have to wear oxygen masks. ​We have cut down (3)____trees that there are now vast areas of wasteland all over the world. As a result, farmers in parts of Africa cannot grow enough to eat. In certain countries in Asia, there is too little rice. Moreover, we do not (4) ____ enough care of the countryside. Wild animals are quickly disappearing. For instance, tigers are rare in India now because we have killed tro many for them. However, it isn't enough simply to talk about the problems. We must act now before it is too late to do (5)____ about it. Join us now. Save the Earth! 1. A. destroyed​​B. destroying​​C. destroys​​D. destroy 2. A. by​​​B. of​​​C. from​​D. in 3. A. so much​​​B. so few​​C. so many​​D. so little 4. A. make​​​B. get​​​C. take​​​D. do 5. A. anything​​B. nothing​​C. everything​​D. something