Khi quạt hoạt động, phần năng lượng nào biến đổi thành điện năng có ích, là vô ích? Nếu hiệu suất của quạt là 85%, tỉ lệ giữa năng lượng có ích và năng lượng hao phí là bao nhiêu?

Ai giải giúp mình chuẩn với ạ. mình đang cần gấp

Viết lại câu, từ trực tiếp -> gián tiếp 71. “Do as I tell you or you’ll be punished. I’ll teach you who is the master in this house” he said 72. I ask Bill “What time did you go to bed last night ?” 73. “What a lovely garden they have !” he said 74. “Would you like to drink some beer” He said to me 75. “Your father shouldn’t smoke too much” I told him 76. “I have left my watch at home. Can you tell me the time ?” said Nam to Nga 77. Tom said “you had better not contact to her” 78. “ Does your father live here ? ”Nam asked Lan

Giải hộ em vs ạ em sẽ cho 5 sao ạ

She/think/this broblem/care/before/she explain/it

Viết lại câu từ trực tiếp -> gián tiếp 61. Tom said “New York is bigger than London” 62. “Please help us” they said to us 63. Tom said to me “Don’t forget to send your parents my regard” 64. The traveler asked “How long does it take to get to London ?” 65. John said “I have finished studying my lesson” 66. Mary said “I cannot go to the movies with you, John” 67. “I shouldn’t do that if I were you. Isn’t it very dangerous ?” he said 68. “When we’ve finished this we’ll have supper” they said to me 69. “Have you got any shampoo, Alice. I must wash my hair” Johnny asked 70. He said to me “Listen! Can you hear something coming?”

Lm hộ em bài 4 với các bro v: Vẽ hình giùm em nữa :(((

Làm 1 avt có chữ Đại gia đình Diamonds là số 1

Tìm x: $\frac{x-1}{x-3}$ = $\frac{2x+1}{2x-5}$

Viết lại câu từ trực tiếp sang gián tiếp: 53. What a dirty face you have!” Ann said to her son 54. “Don’t you know how to behave ? There must be no talking in lessons”, the teacher told his students 55. “I wonder who is coming on the excursion tomorrow. I do hope it won’t rain” she said 56. “Do as you are told. You are naughty boy” Mrs. Brown said 57. “It’s a very nice evening. Why don’t we go out for a walk ?” Jim suggested 58. “It’s not so foggy today as it was yesterday” said the teacher 59. “Be modest if you are a good pupil” said my father 60. “ Shut the door but don’t lock it” she said to us