5. Cho 200 ml dd NaOH 2,5M vào 100 ml dd Al(NO3)3, 1,5M thu được kết tủa A và dd B a. Tính khối lượng kết tủa A. b. Tính nồng độ mol/lit của các ion trong dd B. Chỉ mình bài này với ạ

Chỉ ra và nêu tác dụng của biện pháp tư từ trong 5 khổ đầu bài thơ "Lượm"

Dùng câu văn trên là câu chủ đề, hãy viết một đoạn văn kết bài cho đề trình bày suy nghĩ của em về ý kiến trên : Khiêm tốn là một điều không thể thiếu cho những ai muốn thành công trên con đường đời. Ko chép mạng nếu chép mạng sẽ báo cáo vi phạm Chỉ viết đoạn kết bài thôi nha

Exercise 4. Mark the letter A, B, C or D to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions. 29. Acupuncture originated in China and has been used as a traditional medicine for thousands of years. A. began B. created C. developed D. introduced 30. There is no evidence at this time that acupuncture can treat cancer itself. A. clue B. data C. proof D. sign 31. Acupuncture can treat from simple to complicated ailments. A. acupoints B. diseases C. points D. treatments 32. Some people believe that acupuncture can be a cure of cancer. A. allergy B. practice C. therapy D. treatment 33. Acupuncture can ease nausea and vomiting caused by chemotherapy. A. increase B. prevent C. reduce D. spoil 34. Are there any alternatives that might provide better options for gay people? A. choices B. decisions C. judgements D. votes 35. The old blood cells are broken down by the spleen and eliminated from the body. A. cut out B. exhaled C. removed D. held 36. Humans will enjoy longer life expectancy when they are more conscious of what they eat and do. A. aware of B. capable of C. responsible for D. suitable for 37. Together, all of these treatments are supposed to cleanse your body and stimulate your immune system. A. encourage B. generate C. increase D. expand 38. The most common side effects with acupuncture are soreness, slight bleeding and discomfort. A. direct B. indirect C. original D. unwanted 39. Consuming nuts can boost your heart health and lifespan. A. Eating B. Ingesting C. Inhaling D. Swallowing 40. Doing exercise regularly helps prevent diseases like heart disease, stroke and type 2 diabetes. A. avoid B. cure C. forbid D. reduce 41. Tomato juice contains a rich amount of fiber which helps in breaking down LDL or bad cholesterol in the body. A. compounds B. comprises C. produces D. Provides 42. The human body possesses an enormous, astonishing, and persistent capacity to heal itself. A. cure B. generate C. Protect D. remove GTHÍCH NỮA NHA

Các bạn giúp mình 3 câu này với ạ

rút gon các biểu thức sau: a ) (x - 2) ² + (x + 3) ² -2x (x - 5) b ) (2x - 1) ² - (3 - 2x) ² - (x + 5) (7 - 3x)

Câu 93. Nung m g hỗn hợp X gồm Fe và S trong bình kín không có oxi. Sau phản ứng đem chất rắn thu được tác dụng với lượng dư dung dịch HCl thu được 3,8 g chất rắn A không tan, dung dịch B và 4,48 lít khi Y (dktc). Dẫn khí Y qua dung dịch Cu(NO3), dư thu được 9,6 g kết tủa. Tính hiệu suất phản ứng nung nóng hỗn hợp X. Giúp mình bài này vs ạ. Mình vote 5*

Your English class has received some funds to create an app or website to help current and future students solve their biggest problems. It has not been decided what should be done on the app or website. Các bạn giúp mình với ạ

Giúp mik với ạ Trình bày đầy đủ ra nha

Exercise 3. Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions. 11. The controller of the body is the ____ system. Led by the brain and nerves, it allows us to move, talk and feel emotions. A. circulatory B. digestive C. nervous D. respiratory 12. ____ system of the body lets us break down the food we eat and turn it into energy. A. Circulatory B. Digestive C. Nervous D. Respiratory 13. Skeletal system of the body is made up of our ____. It supports our body and protects our organs. A. bones B. museles C. nerves D. vessels 14. In under a minute, your ____ can pump blood to bring oxygen and nutrients to every cell in your body. A. brain B. heart C. lungs D. vessels 15. The human ____ system is a series of organs responsible for taking in oxygen and expelling carbon dioxide. A. circulatory B. digestive C. nervous D. respiratory 16. A healthy ____ between work and play ensures that everyone has a chance to enjoy their lives. A. balance B. control C. equality D. share 17. He likes to ____ a nap for an hour when he arrives home from work. A. do B. get C. make D. take 18. I’ve been a night owl ____ up late for years, hitting the sheets anytime between 12 and 3 a.m. A. finishing B. getting C. staying D. waking 19. It’s not too late to ____ your bad habits (smoking, drinking, overeating, etc.) and immediately start living a happier, healthier life. A. get rid B. give on C. kick D. remember 20. If people breathe in deeply, their ____ can expand to twice their normal size. A. hearts B. kidneys C. lungs D. stomachs 21. Some foods and spices may ____ your breath for days after a meal. A. damage B. harm C. reduce D. spoil 22. Fish, poultry, beans or nuts ____ half of their dinner plate. A. make of B. make out C. make up D. make up of 23. It’s another name for the backbone. It is ____. A. brain B. leg C. pump D. spine 24. Ailments are caused by a/an ____ of yin and yang. A. abnormal B. imbalance C. unequal D. unfairness 25. Yoga increases endurance, ____ and flexibility. A. blood B. powerful C. strength D. strong 26. Food and drinks which strongly ____ the body can cause stress. A. boost B. develop C. encourage D. stimulate 27. As per the study, handful of nuts daily can cut people’s ____ of coronary heart disease and cancer by nearly 22 per cent. A. chance B. luck C. opportunity D. risk 28. Acupuncture modality relies on sophisticated skills to select appropriate acupoints to ____ needles accurately. A. infuse B. inject C. insert D. install GIẢI THÍCH NỮA NHA