cho 1g bột sắt tiếp xúc với oxi sau mot thoi gian thay kl bot da vuot qua 1,41 g.neu chi tao thanh 1 oxit sat thi do la oxit nao

Giúp em bài 1;2 với ạ Em đanh cần gấp 🙏🙏🙏

l wash the dishes every ...........................

√10x-x ²-16 +3 = 3√x-2 + √8-x Tính. Đây là pt vô tỉ nha

Giúp mình nhanh với ạ Exercise 1: Chọn phương án đúng You don't look well. You see a doctor. could B. need to C. are to D. should She home yesterday because her little son was sick. could have stayed B. must have stayed C. had to stay D. should have stayed You disturb him during his work! should not B. needn't C. mustn't D. don't have to Whose car is this? – It be Anton's. I think I saw him driving a red car like this one. could B. might C. must D. would Though he was ill and weak, he get out of the burning building. was able to B. might C. could D. should lending me your CD player for a couple of days? The windows look clean. You wash them. are not to B. needn't C. don't have to D. mustn't I don't believe it. It be true. can't B. mustn't C. shouldn't D. wouldn't Young people obey their parents. must B. may C. will D. ought to Jenny's engagement ring is enormous! It have cost a fortune. must B. might C. will D. should You to write them today. should B. must C. had D. ought " you hand me that pair of scissors, please?" May B. Will C. Shall D. Should Jeanette did very badly on the exam. She harder. must have studied B. could have studied C. should have studied D. must studied Marcela didn't come to class yesterday. She an accident. should have had B. must have C. might have D. may have had John still hasn't come out. He everything for the trip now. must have been preparing B. must be preparing C. will be preparing D. will have prepared Thomas received a warning for speeding. He so fast. shouldn't have driven B. should have C. would have driven D. might have driven The photos are black. The X-ray at the airport them. should have damaged B. would have damaged C. would damage D. must have damaged Tom didn't do his homework, so the teacher became very angry. He his homework. must have done B. should have done C. might have D. will have done My car stopped on the high way. It out of gas. may run B. must be C. may have run D. should have run I be here by 6 o'clock? - No, you Shall; mightn't B. Must; needn't C. Will; mayn't D. Might; won't Exercise 2: Chọn phương án đúng “Where do you think Rooney is today?". "I have no idea. He late." should have left B. would sleep C. would have sleep D. may have slept A. had to choose B. must have chosen C. should have chosen D. could have been choosing The children "thank you" to you when you gave them their gifts. will have said B. should have said C. must say D. should say If we had known your new address, we to see you. came B. will come C. would have come D. would come These two boys look identical. They twins. must have been B. should be C. must be D. should have been You've been working non-stop for ten hours. You be really tired. should B. must C. would rather D. ought to The fortune teller predicted that inherit a big fortune before the end of this year. will B. she will C. would D. she would I'm feeling very tired this morning. I have stayed up late last night. couldn't B. shouldn't C. mustn't D. to stopping He helped her, but it was not necessary. He needn't her. help B. to help C. be helping D. have helped " you like to play a game of tennis?" "I'd love to." Could B. Will C. Do D. Would His letter is full of mistakes. He the mistakes carefully before sending it. must have checked B. should have checked C. could have checked D. can have checked "I bought two bottles of milk." "You have bought milk; we have heaps of it in the house." couldn't B. needn't C. mustn't D. hadn't When I first went to England, I English, but I it. can read; can't speak B. can read; couldn't speak C. could read; couldn't speak D. could read; can't speak The car plunged into the river. The driver out but the passengers were drowned. is able to get B. could get C. was able to get D. can get I got lost and ask a policeman the way. have to B. must have to C. had to D. would We have some days off after the exam spend some time together? Let B. Shall I C. Shall we D. Would you like You ring the bell; I have a key. may not B. needn't C. mustn't D. couldn't You drink this; it's poison. must B. needn't C. mustn't D. shouldn't Nobody knows how people first came to these islands. They have sailed from might B. must C. should D. had She felt ill and leave early. has to B. must C. had to D. ought

Them tu de hoan chinh cau 1. What/your/address ? 2. What/her/address? 3. My village/far/nosy 4. What/you/do/morning? 5. I/Internet/with/friend 6. How often/you/to/library? 7. I/TV/once/day 8. What/Danang/like? I/small/pretty

Hi everyone , my name " s Linh . I live (1) __ Ha Noi with my parents. Every morning , I get up early . I (2) al____ do morning exercise , have breakfast with my parents and then go school . I go to school on foot because my school is near my house After school I play badminton with my friends (3) s___ times I go to the park with my father In the evening I (4) u____ lu do homework after dinner Then Watch TV I often bed (5)__ 9 o" cock

Tìm x,bết a, |x - 2,5|- 3/4 = 0 b, 1/2 - |5/2 - 2x|= 1/3 c, |0,5x - 2|-|x + 2/3|=0 d, 2x - |x + 1|= 1/2

Nguyên tử có đường kính gấp khoảng 10.000 lần đường kính hạt nhân. Nếu ta phóng đại hạt nhân lên thành một quả bóng có đường kính 6cm thì đường kính nguyên tử sẽ là: A. 200. B. 300. C. 600. D. 1200M.

quãng đường AB dài 120km. một người đi xe đạp từ A đến B cùng thời điểm đó một người đi xe máy từ B về A và gặp nhau tại C cách B 80km. tính vận tốc của mỗi xe , biết vận tốc của xe đạp nhỏ hơn vận tốc của xe máy là 20km/h (giúp mình với mình sắp đi học rồi T~T)