Tính B=1+3^3+3^4+....+3^2016+3^2019

A.X×(1/4)³=(1/4)⁵ B.3/4÷X+(-1/2)³= 1/8 Tìm X

Viết phương trình điện ly, có bao nhiêu nấc ghi từng đó phương trình. Thanks

Tìm 20 từ láy gợi tả tâm trạng cảm giác của con người hẹp myyyyy

duy nhất 1 bài thôi ạ nhưng mình cần gấp nhe

1. “Why don’t you put your luggage under the seat?”he asked. => He suggested 2. Although he had a good salary, he was unhappy in his job. => In spite of 3. I’m sorry I missed your birthday party. => I wish 4. They haven’t cleaned the streets this week. => The streets 5. Apples are usually cheaper than oranges. => Apple are not 6. I advice you to put your money in the bank. => You’d 7. That restaurant is so dirty that no one wants to eat there. => It is such 8. I’ll pick the children up if you like. => Would you 9. He objected to the fact that his secretary came to work late. => He was annoyed 10. Tom is the most industrious pupil. => No other pupil 11. She isn’t accustomed to life in London => She’s not used to 12. “Don’t forget to phone the office,”she told him. => She reminded 13. I’m afraid I haven’t got time to listen to you. => I wish 14. The police has just released John. => John 15. I couldn’t hear them because they were speaking too softly. => They were speaking 16. We spent 5 hours getting to London. => It took 17. I get to work in 20 minutes. => It 18. It is necessary that this work be finished by Monday. => This work 19. It’s a pity I didn’t take my doctor’s advice. => I wish 20. The bread is so tale we can’t eat it. => The bread isn’t Vote 5* :>

Vẽ sơ đồ tư duy của bài: +Hai góc đối đỉnh +Hai đường thẳng vuông góc +Hai đường thẳng song song

Lm cho mik từ câu 21 đến câu 23 thui nha

Giải giúp em đi ạ. E đánh giá cho 5 sao ạ

Kết luận nào sau đây không hoàn toàn đúng ? A. Cao su là những polime có tính đàn hồi. B. Vật liệu compozit có thành phẩn chính là polime. C. Nilon-6,6 thuộc loại tơ tổng hợp. D. Tơ tằm thuộc loại tơ thiên nhiên.