Ở nhiệt độ phòng thí nghiệm (khoảng 20oC), 100 gam nước có thể hòa tan tối đa 200 gam đường. Có thể lấy khối lượng đường là bao nhiêu để tạo dung dịch chưa bão hòa với 300 gam nước?

Làm giúp phần b, c, d :)) mà thấy khó quá ko lm 1 phần cx đc

Cho mẫu lá thép đi được a = 3,2cm , b = 3,8 cm Tính công suất dự kiến của Máy Biến Áp Cho U1 = 48V, U2 = 9V Tính số vòng dây và vẽ sơ đồ quấn dây cho Máy Biến Áp

Có phải mọi tri thức mà con người ta có được đều được coi là tri thức triết học không?

Xác định giá trih của S trong hợp chất H2SO4,H2SO3,Al(SO4)3

Exercise 2: Choose the best answer: 1. I .................................. the accident when I was waiting for the taxi. A. saw B. was seeing 2. What .................... you do when I phoned? A. were you doing B. did 3. They ..................................... their friends last summer holiday. A. didn’t visit B. weren’t visiting 4. It ..................................... heavily last July. A. rained B. was raining 5. While people were talking to each other, he ......................................... his book. A. read B. was reading 6. Chris ............................... pizza every weekend last month. A. was eating B. ate 7. While we ................................. in the park, Mary fell over. A. were running B. ran 8. ..................................... your keys yesterday? A. Did you find B. Were you finding 9. Who.................................. with at the party last night? A. was she dancing B. did she dance 10. They ............................... football on TV all day. A. were watching B. watched

câu chủ động sang bị động ạ làm đến cau 20 thôi ạ

mn giải cho e vs ah.E cảm ơn trc

Exercise 1: Put the verbs in the correct form: past simple/ past continuous 1. I lost my keys when I ________ (walk) home.  2. It was raining while we ________ (have) dinner. 3. I saw the department stores when I ________ (sit) on the bus. 4. Her phone rang while she ________ (talk) to her new boss.  5. My friends ________ (drive) to work when they heard the news on the radio.  6. I _______ (walk) down the street when it began to rain. 7. At this time last year, I _______ (attend) an English course. 8. Jim ________ (stand) under the tree when he heard an explosion. 9. While I _____ (study) in my room, my roommates ________ (have) a party in the other room. 10. Mary and I _________ (dance) the house when the telephone rang.

https://lh4.googleusercontent.com/NL2FvDLKW5NWE982Q0oaZdyRS_yVRWBfB3KPg1ngzvRkXAmM3QbSdcP9aTgm9rowfHsmtaHm6Vfn8_9ChIg8SPBCW-ElMSmsFrEwFLk3skAn2NIgQbpbwGdGH66QjoFt9A=w740 Vì 50 điểm nên yêu cầu giải thích