Vì sao sau khi đo nhiệt độ và lấy nhiệt kế y tế ra khỏi cơ thể, nhiệt độ của nhiệt kế giảm đi nhưng mực thủy ngân trong nhiệt kế vẫn không hạ xuống?

Viết hộ mình câu 2 nhá để 10đ 5sao luôn :)))

Các nước Trung và Nam Mĩ bắt đầu giành đc độc lập từ khi nào? A trc năm 1942 B từ 1942 đến TK XVI C từ TK XVI đến TK XIX D từ đầu TK XIX

Bài 1 : Có hai điện trở R1 và R2 .Biết R2=3R1 và khi mắc nối tiếp điện trở tương đương của đoạn mạch là R=8 ôm Tính R1 và R2 Bài 2 :Mắc nối tiếp R và R' vào mạng có hiệu điện thế 60V thì cường độ dòng điện trong mạch là 1,5 A .Tính điện trở R biết R' =30 ôm

Câu 2. em hãy viết đoạn văn ngắn khoảng 200 từ trình bày suy nghĩ về lời dạy của Hồ Chí Minh Một dân tộc dốt là một dân tộc yếu Câu 2. Viết đoạn văn khoảng 200 từ bày tỏ suy nghĩ của em về niềm tự hào, tự tin vào sức mạnh và tương lai dân tộc của tuổi trẻ trong cuộc sống hôm nay. (Hết)

Ởnhà, các em sưu tầm các mẫu vật là CHẤT DẪN ĐIỆN và CHẤT CÁCH ĐIỆN.

Dịch tiếng việt giúp mình 2 phần khoanh tròn

giúp mình những câu trắc nghiệm này nha! cảm ơn ạ! hứa sẽ vote cảm ơn đầy đủ♡♡♡

1. The man ________ spoke to John is my brother. A. whom B. who C. whose D. which 2. I must thank the man from _____ I got the present. A. who B. whom C. that D. which 3. It is a car ______ I bought last year. A. whom B. who C. which D. whose 4. He is the man _______ son is a doctor A. whom B. which C. who D. whose 5. I come from a city _______ is located in the southern part of the country. A. who B. whom C. that D. whose 6. The film about _____ they are talking is fantastic. A. who B. which C. whom D. that 7. That ’s the woman to _______ Jim used to be married. A. who B. whom C. which D. that 8. The people ________ for the bus in the rain are getting well A. waiting B. to wait C. waited D. wait 9. He is the boy _______ is my best friend A. that B. whom C. who D. A& C 10. I have a message for people __________ by the traffic chaos. A. to delay B. who delay C. delayed D. who delaying 11. I live in a pleasant room ____________ the garden. A. to overlook B. overlooking C. overlooked D. which overlooking 12. Melanie was the only person __________ a letter of thanks. A. wrote B. written C. to write D. writing 13. The pilot was the only man __________ after the crash. A. was rescued B. rescued C. rescuing D. to be rescued 14. I met a lot of new people at the party ________ names I can’t remember. A. whose B. which C. who D. whom 15. I talked to a woman __________ car had broken down on the way to the party. A. which B. who C. whose D. whom 16. Vicky, __________ name was missed off the list, wasn’t very pleased. A. which B. whose C. who D. whom 17. The picture was painted by Laura, ____________ is being shown in an exhibition. A. which B. whose C. who D. whom 18. The concert ___________ we are looking forward is next Saturday. A. which B. that C. whom D. A & B 19. I’ll see you near the post office ___________ we met the other day. A. which B. where C. when D. why 20. The success of shared holidays depends on __________ you shared it with. A. whose B. who C. whom D. which 21. “Would you mind if we ___you by your first name?” “Not at all. Please call me Tom.” A. called B. call C. calling D. want to call 22. She can ’ t get home ___ she has no money. A. unless B. if C. until D. without 23. If I had known your new address, we ___to see you. A. came B. will come C. would come D. would have come 24. If we took the 10:30 train, ___. A. we would arrive too early B. we should arrive too early C. we will arrive too early D. we may arrive too early 25. It ’ s very crowded here. I wish there ___ so many people. A. aren ’ t B. weren ’ t C. haven ’ t been D. isn ’ t 26. I wouldn ’ t go there at night if I ___ you. A. am B. was C. were D. had been 27. If I ___ get a pole, I ’ ll go fishing. A. can B. could C. may D. might 28. If they had enough time, they ___ head south. A. will B. can C. must D. might 29. If you ___ a choice, which country would you visit? A. have B. had C. have had D. will have 30. Trees won ’ t grow ___ there is enough water. A. if B. when C. unless D. as 31. ___ she agreed, you would have done it. A. If B. Had C. Should D. Would 32. If you ___ to be chosen for the job, you ’ ll have to be experienced in the field. A. want B. wanted C. had wanted D. wants 33. If the doctor had arrived sooner, the boy ___. A. might be saved B. have been saved C. was saved D. might have been saved 34. If there ___, the rice fields could have been more productive. A. had been enough water B. were enough water C. would be enough water D. are enough water 35. The patient could not recover unless he ___ an operation. A. had undergone B. would undergo C. underwent D. was undergoing 36. If she ___ him, she would be very happy. A. met B. will meet C. is meeting D. should meet 37. If he ___ a thorough knowledge of English, he could have applied for this post. A. had had B. had C. has D. has had 38. If I had enough money, I ___ abroad to improve my English. A. will go B. would go C. should go D. should have to go 39. If it ___ convenient, let ’ s go out for a drink tonight. A. be B. is C. was D. were 40. If you ___ time, please write to me. A. have B. had C. have had D. has

cho ΔABC vuông tại A. Gọi D là trung điểm của AB. Kẻ DE vuông góc với BC( E ∈BC),Tính độ dài AC,biết BE=7 cm, EC=25 cm mn giúp mình với ạ