Hoàn thành phương trình hóa học sau: C-->CO2-->NaCO3-->MgCO3-->MgCO4-->Mgcl2-->Mg(NO3)2 .

Use the correct form of the verbs in bracket I (just, receive).....................a letter from my brother Tim. He is in Australia. He (be)..................there for three years. he (buy)..........an Australia car two years ago. He (already, visit)................a great number of different places in Australia. He (work).................for a big firm now. he usually (drive)...................to work. My brother (never, be).................abroad before, so he is finding this trip very exciting. He said he (go)....................visit his friend in Sydney next week.

Vẽ chibi hay anime j Cx đc nhé k ve quá tao lao

Hãy kết hợp hai câu sau dùng to hoặc in order to 1. He rang a bell. He wanted to tell us that dinner was ready 2. I am buying paint. I want to paint my hall doors 3. She is studying English. She wants to go to The USA next year 4. You should take your holidays in June. In this way you would avoid the rush 5. The boys are collecting sticks. They intend to put them on the fire 6. The town council has forbidden coal fires. They are trying to keep the air clean 7. He turned out the night. He didn't want to waste electricity

Hãy kết hợp những cặp câu sau, dùng so that 1. He went to the airport. He wanted to meet his father 2. She wore warm clothes. She didn't want to get cold 3. Please arrive early. We want to be able to start work on time 4. I took off the shoes. I didn't want to make any noise 5. We must keep our gloves on. We don't want to get frost bitten 6. The workmen left red lights near the hole. They wanted to warm motorists 7. She locked the door. she didn't want to be disturbed

Câu hỏi : bạn hãy tìm 1 số bài tập liên quan đến Tích chất bằng nhau của 1 tam giác vuông (Chương 2 Toán Hình Lớp 7 ) Ko copy bài trên mạng nhé

đốt cháy V lít thu được 3,6g hơi nước . Biết rằng oxi chiếm 20% thể tích không khí .Vậy thể tích không khí ở đktc cần dùng là: a) 336 lít b)3,36 lít c)33,6 lít d)0,336 lít

Hãy rút gọn những mệnh đề quan hệ sau đây ra cụm từ 1. The girl who is sitting in the front row is a French -> The girl sitting in the front row is a French 2. The book which is on the top shelf is the one that I need 3. The car which is driven by Mr. Jones is very expensive 4. The woman who drinks coffee with them is Mrs. Allen 5. The man who is running down the street might be in trouble 6. The reporter who wrote that article is Mr. Jackson 7. That is the street which leads to the supermarket 8, Mr. George is the man who was chosen to represent the committee at the convention

bạn nào rảnh ngồi vẽ giúp mềnh con thor avt mềnh ik ^^ 30đ nha^^

1) nêu các hình thức truyền nhiệt? 2) tại sao khi pha nước đường người ta thường hoà tan đường với nước rồi mới cho đá vào? 3) giải thích tại sao khi xịt nước hoa ở góc phòng 1 lúc sau thì cả phòng đều có mùi nước hoa? 4) khi cọ xát đồng xu lên mặt bàn thì đồng xu nóng lên. Có phải đồng xu đã nhận thêm 1 nhiệt lượng hay không? tại sao?