Cần pha thêm bao nhiêu lít nước sôi vào 15 lít nước lạnh ở 24oC để thu được nước ở 38oC?

VI. Read the passage and choose the letter A, B, C or D to answer these following questions Dear Shirley, You won’t believe what Jack and I did last weekend! We went to Cancun! We got there early Friday morning, checked in, and went straight to the beach. We went scuba diving all morning, and we relaxed on the beach and swam all afternoon. On Saturday, we went to Tulum, the Mayan ruins about two hours south of Cancun. On Sunday, we rented a sailboat and went sailing. And then we went parasailing on the beach. It was a lot of fun! As soon as I came down from parasailing, we had to run to the hotel, check out, and get to the airport. We slept all the way home, but what wonderful three days!\n Love, Beth 41 What was the letter written about? a. A business trip b. A school trip c. A trip to Cancun d. A trip to Tulum 42 The word ‘got’ in line 1 could be replaced by which of the following? a. bought b. arrived c. took d. became 43 What does ‘as soon as’ in line 5 mean? a. Before b. When c. If d. On time 44 Jack and Beth didn’t go ______. a. scuba diving b. sailing c. sightseeing d. skiing 45 How was the trip? a. It was terrible b. It was awful c. It was great d. a & b are correct VII. Choose the word or phrase (A, B, c or D) that best fits the blank space in the following passage? Harvest Festival is (1)_____ October. It is a very ancient (2) _____, but it is also part of the Christian tradition. It (3) _____ new crops and food. Children often bring fruit, vegetables and cereals into school. Schools usually give the food to hospitals or to old people. (4) _____ the past, people sometimes (5) _____ traditional dolls out of corn. 46a. in b. at c. on d. from 47a. thing b. festival c. vacation d. holiday 48a. gives b. supplies c. celebrates d. holds 49a. In b. At c. On d. Since 50a. make b. made c. making d. are making

cho các chất sau: Na2CO3, K2SO4, Ca(NO3)2, MgCl2, BaCO3, MgSO4, Cu(CO3)2. Lập PTHH của PƯ( NẾU CÓ)khi các chất tác dụng với nhau từng dôi một

IV. Rewrite the sentences so that they are nearest in meaning to the sentence printed before them. 26 They planted the trees along the streets last week The trees 27 People play football all over the world Football 28 Can you turn on the TV, please? Do you mind 29 Can I go to the movies? Would you mind 30 Nga said “I am interested in learning English.” Nga said that V. Choose the correct sentence from the four options a, b, c or d 31 Alexander Graham Bell invented the telephone in 1876 a. The telephone is invented by Alexander Graham Bell in 1876 b. The telephone was invented by Alexander Graham Bell in 1876 c. The telephone in 1876 were invented by Alexander Graham Bell. d. The telephone will be invented by Alexander Graham Bell in 1876 32 We are interested in protecting environment. Our teacher is pleased a. Our teacher is pleased that we are interested in protecting environment. b. We are interested in protecting environment that our teacher is please c. Our teacher is pleased to protect environment. d. Our teacher is pleased to be interested in protecting environment. 33 My father bought this house 2 years ago. a. This house was bought by my father 2 years ago. b. This house bought by my father 2 years ago. c. This house were bought 2 years ago. d. This house 2 years ago is bought by my father. 34 The car is very beautiful. It is made in Japan. a. The car is very beautiful made in Japan. b. The car made in Japan is very beautiful. c. The car making in Japan is very beautiful. d. The car is made beautiful in Japan. 35 They haven’t seen their uncle for ten years. a. The last time they saw their uncle was ten years ago. b. Ten years ago they first saw their uncle. c. Ten years is a long time for them to see their uncle. d. It’s ten years when their uncle first saw them. 36 “ Can I borrow your ruler, Lan?” asked Viet. a. Lan asked Viet if Viet could lend her his ruler. b. Viet asked whether he could borrow Lan’s ruler. c. Viet wanted to lend Lan his ruler. d. Lan wanted to borrow Viet;s ruler. 37 festival/ enjoyed/ very much/ Mr Robinson/ the/ that/ he/ said a. He enjoyed the festival very much Mr Robinson said that b. Mr Robinson enjoyed the festival that he said very much. c. Mr Robinson said he enjoyed that festival the very much. d. Mr Robinson said that he enjoyed the festival very much. 38 Nobody will solve this hard problem. a. This hard problem will be solved b. This hard problem won’t be solved c. This hard problem isn’t solved d. All are correct 39 Which sentence is correct? a. All the flights was cancelled because of thick fog yesterday. b. All the flight were cancelled because thick fog yesterday. c. All the flights were cancelled because thick fog yesterday. d. All the flights were cancelled because of thick fog yesterday. 40 She said to me "I will go to China next week.” a. She said she would go to China the following week. b. She said she will go to China the following week. c. She said I would go to China the following week. d. She said she would go to China next week.

Viết cấu hình e, xác định số lớp e, số e LNC, tính KL, PK của các nguyên tử có Z = 2, 3, 4, 7, 8, 10,11 ;12 ; 15 ; 16 ; 18, 24, 26, 29, 30, 35

Mong các anh chị và các bạn giúp mình với ạ

' Do your sister and brother go to the same school? ' , asked Nam. —> Giúp với ạ

Bất kỳ một quan điểm nào cũng có thể thay đổi, điều quan trọng là bạn có “muốn” thay đổi hay không mà thôi. Mọi thứ không bỗng dưng mà có, thái độ cũng vậy. Để có một thái độ sống đúng đắn, trước tiên ta cần hình thành nó, rồi dần dần phát triển lên, biến nó thành tài sản quí giá cho bản thân. Một số người từ chối việc thay đổi, họ cho rằng “Tôi đã quen sống như này từ nhỏ, thay đổi chỉ làm cuộc sống thêm rắc rối mà thôi!” hoặc “Cha mẹ sinh mình ra thế nào thì cứ thế ấy, thay đổi làm gì cho mệt!”. Bạn cần biết rằng, không bao giờ là quá trễ cho một sự thay đổi. Nhờ thay đổi, con người mới có những bước tiến vượt bậc. Không chấp nhận thay đổi, cuộc sống của bạn sẽ trở nên nghèo nàn, thậm chí bạn sẽ gặp những rắc rối lớn. Bạn gọi một cái cây không đâm chồi nẩy lộc, không ra hoa kết trái là gì? Đó chẳng phải là “cây chết” hay sao? Con người chúng ta cũng vậy. Cuộc sống sẽ luôn được vận hành tốt nếu ta không ngừng hoàn thiện bản thân. Những ai không chịu thay đổi cho phù hợp với cuộc đời sẽ chẳng thể nào thích nghi được với hoàn cảnh. Có thể họ vẫn hiện hữu nhưng trong cuộc sống của họ sẽ bị tách biệt, không bắt nhịp được với đồng loại của mình. Đặt nhan đề cho đoạn trích

tính hợp lý :-8/3-1/5+7/4-5/6+0,7

so sánh BẰNG CÁCH NHANH NHẤT, ko đc so sánh tầm thường: -15/61 và 1111/-4443 so sành phải bằng cách tính nhanh, logic sẽ đc 5 sao + ctlhn. ty