oà tan hoàn toàn hỗn hợp gồm magie và kim loại R( hoá trị 2) trong dung dịch axit clohidric thu được 6,72 l khí ( đktc). Đun cạn dung dịch sau phản ứng thu được 31,7g muối khô. Xác định kim loại biết trong hỗn hợp số mol kim loại bằng 1/2 số mol magie giải thích dùm vì sao: 0,2.95+0,1.(R+71)=31,7

Số nghiệm nguyên thuộc (-2018; 2018) của bất phương trình gttđ(x^2 - 8) > 2x là: a. 4033 b. 4031 c. 4030 d. 4032

tinh bang cach nhanh nhat 15+45+75+150+1500+15000

Thấy cái tên kem hay kẹo hay Vẽ cái kem vs cái kẹo ( kẹo thì vẽ kẹo mút nhé) '-' đề dễ nên k tl linh tinh

ai bt nghệ thuât thủy tinh k, vẽ cho 1 bức đi, cs màu nha cảm ơn trc "))

Giúp e câu 11,12,13,15 e cần gấp ạ

Cho tam giác ABC đều nội tiếp trong (O; R) . Các đường BO; CO cắt (O) lần lượt tại E và F. Trên AE lấy điểm M tùy ý không trùng A và E, các đường FM; BE cắt nhau tại N, OM cắt AN tại G Ch/m Tứ giác AGEO nội tiếp

WHICH CAREER? 1. MEDICINE A medical career means years of studying and dedication and although it is a prestigious career, doctors must be prepared to sacrifice some of their private life. To become a doctor you need to spend years at university before working in a hospital. During the first few years of a medical career a doctor has to be on call day and night. Then, depending on the area of specialization, for example they could choose to become a surgeon, a doctor may start to make a lot of money. This ability to make money and the fact that doctors have a high standing in society explains why many parents want their children to become doctors. 2. TEACHING You will never become rich if you choose to enter the teaching profession, but teaching can be a very rewarding career and of course there are the long vacations. You should be prepared to work with children who may not be interested in school, as well as those who want to study. Becoming a teacher is more than just getting a teaching qualification at university, it requires a certain talent to get your ideas across to young people whilst making it enjoyable. This is probably the teacher’s hardest task, making lessons fun, but still making sure students are learning. 3. PLUMBING Although it is a very important job, many young people do not think of plumbing as a possible career choice. Yet society always needs plumbers and there is often a shorteage of good, qualified people around which means they can change high prices for their services. Not only can plumbers earn good money, they are also guaranteed constant work and they can choose to work the hours that suit them. In fact being a skilled worker is very advantageous in today’s society. Young people should accept that a university education does not always guarantee a reasonable income, being a good plumber does. 4. AVIATION Though it is consisdered a glamorous, high-paying job, being a pilot is very demanding work. First the training is very extensive and pilots must have passed a medical before they can even start to learn. Pilots who want to get a commercial license need to spend hundreds of hours flying and pass an exam. It is a very responsible job as the lives of hundreds of people may depend on the pilot’s ability to think and act quickly under pressure. Also, a pilot has to spend a lot of time traveling away from home and family, which may account for the fact that there are so few women commercial pilots. It is an ideal job for a person who wants stable family life. 5. THE ARMY Once the army was strictly a man’s world which women could not enter. But times have changed and many women see army life as a challenging and interesting career. Recruiting centers advertise the army as a place where soldiers can learn a valuable trade, such as engineering or computing, which will be useful if they choose to leave the army. Soldiers must also be willing to travel, even though many of their destinations will be dangerous, but if you enjoy it, an army career will certainly guarantee you a job for life. 1. Which career used to be only for men? A. 1 B. 3 C. 4 D. 5 2. Which of the jobs is considered to be the least pretigious? A. 1 B. 2 C. 3 D. 5 3. Which job is highly rated by parents? A. 1 B. 2 C. 4 D. 5 4. If you want to make a lot of meny which profession should you avoid? A. 1 B. 2 C. 3 D. 5 5. For which two careers do you have to go to university? A. 1 and 2 B. 1 and 4 C. 2 and 5 D. 1 and 5 6. Which career promises steady work? A. 1 B. 2 C. 3 D. 4 7. For which careers must you make sacrifices in your family life? A. 1 and 2 B. 2 and 4 C. 1 and 4 D. 2 and 5 8. If you like traveling which jobs should you consider? A. 1 and 2 B. 2 and 3 C. 3 and 4 D. 4 and 5 9. For which job must you pass a medical? A. 1 B. 2 C. 3 D. 4 10. If you had young children which profession should you consider? A. 2 B. 3 C. 4 D. 5

tìm một số biết rằng số đó nhân với 5 thì bằng 235 cộng với 700

tinh bang cach nhanh nhat 1+3+5+7+9+11+13+15+17+19