Một thanh nhôm và một thanh đồng ở 100oC có độ dài tương ứng là 100,24 mm và 200,34 mm được hàn ghép nối tiếp với nhau. Cho biết hệ số nở dài của nhôm là 24.10-6 K-1. Và của đồng là 17.10-6 K-1. Xác định hệ số nở dài của thanh kim loại ghép này.

Viết đáp án bằng tay, trước 4h30 nha mn, khỏi giải thích

Để ngừng gia tăng dân số thì nên làm gì?!

E. The past progressive tense : 65. I was studying my English lesson last night -> 66. They weren’t writing Lenin’s words on the poster -> 67. We were playing football when it rained -> 68. Mary was talking to John when I saw them -> 69. Was the mailmain delivering the mails then ? -> 70. Police were holding him for further questioning -> 71. Were they studying Mathemastics then ? -> 72. They weren’t asking me many difficult questions ->

lm hộ e vs ai vote 5 điểm +ctlhn

giá trị lớn nhất của biểu thức : 4 - ( x - 55)^22 là ..............

Dựa vào hình dung và tưởng tượng của bản thân, hãy viết đoạn văn ( khoảng 8 – 10 câu) miêu tả những âm thanh trong cuộc sống mà em yêu quý. Giúp mình không chép trên mạng nha!

Write a short paragraph a about how to plant sunflowers NL dùng sequence adverb nha Mik cmr ơn trước

31. I couldn’t do the test because it was difficult. >> Because of…………………………………………………………………………… 32. I couldn’t read the letter because it was dark. >> Because of…………………………………………………………………………………… 33. I can’t study because it is noisy. >> Because of…………………………………………………………………………………… 34. The train come late because it was foggy. >> Because of…………………………………………………………………………………… 35. The train was late because the fog was thick. >> Because of…………………………………………………………………………… 36. I can’t sleep because the weather is hot. >> Because of…………………………………………………………………………………… 37. All the teacher love him because his conduct is good. >> Because of……………………………………………………………………… 38. Because there was a traffic accident, I went to school late. >> Because of……………………………………………………………………………… 39. Because there is a shortage of meet, we had to live on beans. >> Because of……………………………………………………………………… 40. Because there was a lack of water, many trees died rapidly. >> Because of……………………………………………………………………………………………… 41. She walked slowly because her leg was injured. >> Because of…………………………………………………………………

Exercise 2. Put in the present perfect or past simple of the verbs in brackets. 1. Martin (be) ________ to Greek five times. He loves the place. 2. I (work) ________ for a computer company for a year. That was after college. 3. We (move) ________here in 1993. We (be) ________ here a long time now. 4. It isn’t a very good party. Most people (already/ go) ________ home. 5. It was so hot today that I (wear) ________ shorts and a T-shirt at work. 6. My wife and I (move) ________ three times since we (get) married. 7. So far this week there (be) ________ three burglaries in our street. 8. When I was younger I (play) ________ badminton for my local team. 9. In the past few years, it (become) ________ more and more difficult to get into university. 10. I (enjoy) ________ skiing ever since I (live) ________ in Switzerland. 11. I (not see) ________ Rachel for ages. She (not visit) ________ us since July.