MỌI NGƯỜI GIÚP EM VỚI Ạ EM CẦN GẤP

III. Reading: Read and answer the questions. SOME WAYS TO STAY HEALTHY 1. Do more exercises Stay in shape is our most important tip. You can play football, or even go for long walks. It’s OK, but make sure it’s three times a week or more. 2. Sleep more Getting plenty of rest is really important. It helps you to avoid depression and it helps you concentrate at school. You’ll also be fresher in the mornings. 3. Eat less junk food You are what you eat! So make sureit’s healthy food like fruits and vegetables, not junk food. It can help you to avoid obesity too. 4. Wash your hands more It’s so easy to get flu. We should all try to keep clean more. Then flu will find it harder to spread. 5. Watch less TV There are some great things to watch. But too much isn’t good for you or your eyes. 6. Spend less time playing computer games Finally, at number 6, we all love them, but many of us need to spend less time playing computer games! Limit your time to just an hour or two, two or three days a week, or less! 1. How many ways are there to keep healthy? 2. What does the writer mean by "staying in shape"? 3. Why do we need to sleep more? 4. What should we do to avoid getting flu? 5. Should we watch TV much? 6. Is junk food a kind of healthy food? 7. According to your opinion, why shoudn't we sit in front of computer screen much? Nhanh, ko cần gth

$\frac{1}{2}$ thế kỉ 5 năm =…………năm 1 phút = ..... giờ 1 g = .....kg 1 dm = ........m

xét 2 cặp gen (A,a và B,b) nằm trên 2 cặp NST thường khác nhau. Biết mỗi cặp gen quy định 1 tính trạng, alen trội là trội hoàn toàn, có bao nhiêu phép lai cho đời con phân ly kiểu hình theo tỉ lệ 3:1? (không xét đến phép lai thuận nghịch)

ạ cj giúp e vs ạ ( cần gấp ak )

Giúp mình với,chỉ 1 câu hỏi thui The term "virus" is derived from the Latin word for poison or slime. It was originally applied to the noxious stench emanating from swamps that was thought to cause a variety of diseases in the centuries before microbes were discovered and specifically linked to illness. But it was not until almost the end of the nineteenth century that a true virus was proven to be the cause of a disease. The nature of viruses made them impossible to detect for many years even after bacteria had been discovered and studied. Not only are viruses too small to be seen with a light microscope, they also cannot be detected through their biological activity, except as it occurs in conjunction with other organisms. In fact, viruses show no traces of biological activity by themselves. Unlike bacteria, they are not living agents in the strictest sense. Viruses are very simple pieces of organic material composed only of nucleic acid, either DNA or RNA, enclosed in a coat of protein made up of simple structural units. Question 1. Before microbes were discovered it was believed that some diseases were caused by__________. A. germ-carrying insects B. certain strains of bacteria C. foul odors released from swamps D. slimy creatures living near swamps

Cần gấp trước 4h chiều nay Bài 18 ạ

Hộ mình 2 câu này với ạ.Mình xin cảm ơn nhiều

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tam giác ABC nhọn,đường cao AH,gọi E,F lần lượt là hình chiếu AB,AC a) AH^2=AF.AB b) AE.AC=AF.AB c) tam giác AEF đồng dạng tam giác ABC