Tổng số hạt proton, nơtron, electron trong nguyên tử của một nguyên tố kim loại X là 58. Viết kí hiệu nguyên tử.

Làm giúp em bài 3 em đang cần gấp ạ

Tìm số dư khi chia 234^456 cho 21.

Bài 2 : ( 2,5 điểm) Giải các phương trình sau : a)√(1-x)+√(4-4x)-12=0 b) √(4x^2-4x+1)=3

1.Miss while swears that she (never see) ...that man before 2.i think john (be) ...out of town now 3.she understood that we (promise)...to go

Làm giúp mình với ạ, có giải thích luôn. Mình cảm ơn 1. Chandler is going to be famous star one day. He_________(appear) in five movies already. 2. A: What_________(think) about the new simplified tax law? B: It’s more confusing than the old one. 3. A: Hurry up! What’s taking you so long? B: I’ll be there as soon as I_________(find) my wallet. 4. It is six o’clock and he is bored because he_________(wait) for two hours. 5. While the children_________(play) by the lake, one of them_________(drop) his bail and_________(try) to get it out himself. 6. A: Could someone help me lift the table into the pickup truck? B: I’m not busy. I_________(help) you. 7. You look really great! _________ (exercise) at the fitness centre lately? 8. A: Billy’s English_________(improve), isn’t it? B: Yes, he has been watching American TV programs every day since he first arrived in San Francisco last December. He will soon be totally fluent. 9. Monica's eyes hurt and her shoulders ached. She_________(sit) at the computer for eight straight hours. Finally, she took a break. 10. It is the first time we_________(be) to a Mexican restaurant.

Cho phân số 4/9. Nếu thêm 27 vào mẫu số của phân số thì phải cộng thêm bao nhiêu vào tử số của phân số đó để được phân số 4/9

phan biet benh cam cum , cam lanh , corona

I. Complete the sentences with the correct possessive forms. 1. ……………. mother is my teacher of English.(Mai) 2. Is it ……………. study room? (Nam) 3. …….My ………….. bedroom is my favorite room in our house. (Grandmother) 4. My………….. father is my uncle. (cousin) 5. Look!................... dog is running in the park. (Tom) 6. There is a cat behind my……………… computer. ( sister).

Điền câu điều kiện loại 1 vào chỗ trống: -If I ... (to study),I...(to pass) the exams -If the sun...(to shine), we ...(to walk)into town -If he...( to have) a temperature, he...(to see) doctor