Câu 8. Một bóng đèn có công suất 90W, hoạt động bình thường và liên tục trong 2 giờ . Điện năng bóng đã tiêu thụ 1 ngày là: A. 40Wh. B. 24Wh. C. 60Wh. D. 180Wh. Câu 9. Cầu chì thuộc loại thiết bị điện nào ? A. Thiết bị lấy điện. B. Thiết bị bảo vệ. C. Thiết bị đóng- cắt. D. Cả ba loại thiết bị trên. Câu 10. Thiết bị nào dưới đây dùng để bảo vệ đồ dùng điện, thiết bị điện ? A. Phích cắm điện B. Cầu chì C. Ổ điện D. Cầu dao Câu 11. Ở nước ta, mạng điện mà hộ gia đình sử dụng có điện áp là: A. 120 V B. 220 V C. 110 V D. Đáp án khác Câu 12. Quạt điện là đồ dùng loại: A. Điện nhiệt B. Điện quang C. Điện cơ D. Đáp án khác. Câu 13. Khi hoạt động, các đồ dùng loại điện nhiệt đã biến đổi ? A. Nhiệt năng thành điện năng B. Điện năng thành nhiệt năng C. Điện năng thành quang năng D. Tất cả đều đúng

Nhanh hộ mik vsssss!!!!!!!!!!! Cứuuuuuuuuuuuuuuuuuuu

Giúp mình đi làm ơn đó thiên linh linh ơ địa linh linh xin thần linh tinh xin hãy xuất hiện , ngươi mau giúpcon .

hmu hmu nhanh với ạ, chốt 10h15

24/ No one in my group is better at English than Linh.  Linh is ................................................ 25/ Phong speaks French more fluently than Thuy.  Thuy does .................................................... 26/ He plays football more skilfully than me.  I don't .................................................................... 27/ Mrs Hoa doesn't work as hard as her husband.  Mrs Hoa 's husband works ........................................................................................................... 28/ He doesn't run as quickly as five years ago.  Five years ago he ......................................................................................................................... 29/ My sister usually gets up later than me.  I don't usually ......................................................... 30/ French is more difficult than English.  English ....................................................................... 31/ Nam isn't so careless as his brother.  Nam's brother ............................................................... 32/ My house is much smaller than his.  His house ....................................................................... 33/ The streets in Ha Noi aren't as quiet as those in Paris.  The streets in Paris ........................................................................................................................ 34/ Yesterday, Mr Pike didn't drink as much beer as Mr Withe.  Yesterday Mr Withe...................................................................................................................... 35/ Mrs Ha is 2 years younger than Mrs Lanh.  Mrs Lanh ............................................................ 36. He hasn't written to his parents for 2 months.  The last time .................................................. 37. I've never been to Scotland before.  This is .............................................................................. 38. I started learning English 5 years ago.  I've .............................................................................. 39. The last time I saw him was in 1995.  I haven't ....................................................................... 40. We haven't seen Ann for ages.  It's ages .................................................................................. 41. Linda's career as a television presenter began 4 years ago.  Linda has been ............................................................................................................................. 42. It started to rain at two o'clock.  It has ...................................................................................... 43. Samuel started keeping a diary 2 years ago.  Samuel has ........................................................ 44. It is ages since I last saw you.  I haven't ................................................................................... 45. We last saw him when we were students.  We haven't ........................................................... 46. She is the most beautiful girl I've ever met.  I've never............................................................ 47. He hasn't received news from home for two months.  The last time .....................................

correct the mistakes in the sentences 1.Kerry runs the English club during her break Wednesdays. 2. The students don't speak English when they have a break 3. the students like doing grammar exercises in English 4. The students can't speak good English at the moment. ========================================================================== Các bn chỉ cần ghi lại chỗ nào sai rồi sửa lại thôi 20đ lận

Exercise 4 1/ They were more tired yesterday than today.  Today they ........................................................ 2/ Mr Hai is a good driver.  Mr Hai drives ..................................................................................... 3/ English isn't so difficult as Maths.  Maths is ......................................................................... 4/ His brother is not so good at French as him.  He is ............................................................... 5/ His role is more important than mine.  My role ...................................................................... 6/ I can't swim as well as Jane.  Jane ........................................................................................... 7/ No one in my class is noisier than Lan.  Lan is ........................................................................ 8/ We didn't do the test as fast as Linh.  Linh did ........................................................................ 9/ Peter can't run as far as Tim.  Tim runs ................................................................................... 10/ My kitchen is smaller than yours.  Your kitchen ................................................................... 11/ Phong speaks English more fluently than I do.  I ................................................................. 12/ She is a dangerous driver.  She ............................................................................................... 13/ Hoa is a careful typist.  Hoa ..................................................................................................... 14/ Mary dances marvellously.  Mary is ...................................................................................... 15/ Celine Dion sings wonderfully.  Celine Dion is ..................................................................... 16/ Lien is a good speaker of English.  Lien speaks ...................................................................... 17/ We don't know a lazier person than her.  She is ...................................................................... 18/ Nothing is more interesting than football.  Football is ........................................................... 19/ I am 20 years old. My brother is 40.  My brother is twice ...................................................... 20/ Everest is higher than any mountains in the world.  Everest is .............................................. 21/ Minh is the most hard-working in our class.  No one ........................................................... 22/ You have more money than us.  We ....................................................................................... 23/ Mr Robinson is the poorest person in our town.  No one .......................................................

chọn đáp án + giải thích tại sao + dịch câu

giải hệ pt ; (x+ √x²+4 )(y+ √y²+1 ) = 2 (pt1) 12y² -10y + 2 = 2∛x³+1 (pt2)

Nêu cảm ơn của những bạn học sinh sắp phải chia tay nhau ( bạn nào giống mình sắp thi vào 10 nha)