1 Hãy vẽ và trình bày cách vẽ tia tới và xác định góc tới và góc phản xạ trong trường hợp sau

612dm2= m2 dm2 50043cm2= m2 cm2 7dm2 19cm2= cm2 1/2m2= dm2 50cm2= dm2 1/100m2= cm2 đổi giùm mk nhớ giải thích luon

Cho 4,4 gam hỗn hợp X gồm Mg và MgO phản ứng hoàn toàn với dung dịch axit sunfuric loãng, dư, thu được 2,24 lít khí (đktc). Khối lượng MgO có trong hỗn hợp X là

Mn ơi nhanh giùm mik nha cần gấp

Bài tập khoanh Exercise 3: Mark the letter A, B, C, orD to indicate the correct answer to each of the following questions. 1. Before she left for Australia she promised her parents that she would drop them at least once a month. A. a note B. a word C. the news D. a line 2. I was all set to take the job in Tokyo, but at the last minute I and decided to stay in Britain. A. pulled my finger out B. got cold feet C. held my horses D. called it a day 3. “What I’ve got to say to you now is strictly publication,” said the government official to the reporter. and most certainly not for A. beside the point B. for the time being C. by the way D. off the record 4. I’ve never enjoyed going to the ballet or the opera; they’re not really my . A. piece of cake B. chip off the old block C. biscuit D. cup of tea 5. “What’s wrong with Tom today? He’s unusually quiet.” “He’s got something on his . I expect.” A. brain B. mind C. thoughts D. brow 6. He was wearing very shabby, dirty clothes and looked very . A. easy-going B. down to earth C. out of shape D. down at heel 7. Since he started his own business he has been making money hand over . A. fist B. heel C. head D. palm 8. I can’t see us beating them at tennis this year - we’re so out of . A. step B. practice C. fitness D. breath 9. I’m not surprised that Tom is ill. He’s been to affect his health sooner or later. for a long time. It was bound A. having his cake and eating it B. burning the candle at both ends C. playing with fire D. going to town 10. I just couldn’t remember her name even though it was on the of my tongue. A. edge B. tip C. top D. front Exercise 4: Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions. 1. That’s exactly what I mean, Tom. You've ! A. put your foot in it B. killed two birds with one stone C. put two and two together D. hit the nail on the head 2. “I’m going for an interview for a job this afternoon.” “Good luck! I’ll keep my crossed for you.” A. legs B. fingers C. arms D. hands 3. “If only I hadn’t lent him all that money!” '‘Well, you did, so it’s no good crying over milk.” A. spilt B. wasted C. sour D. goat’s 4. The car swerved to avoid a cyclist and just missed hitting a passer-by.by . A. a slight edge B. a narrow escape C. a close thing D. a hair’s breath 5. Well, well, if it isn’t Kathy Lewis! You’re a sight for _____eyes! A. old B. blue C. sore D. crocodile 6. I know times have been bad lately, Peter, but keep your up; things are bound to get better soon. A. chin B. head C. socks D. mind 7. He may be shy now, but he’ll soon come out of his when he meets the right girl. A. shoe B. shell C. shed D. hole 8. I’m afraid you’ve caught me on the afternoon. _____. I wasn’t expecting you until this A. stove B. grapevine C. spot D. hop 9. Nagging Susan to stop smoking has no effect on her. It’s like water off _____ A. a windmill B. a duck’s back C. a dripping tap D. an umbrella 10. Have you seen the new boss? She’s the image of Marilyn Monroe. live B. true C. spitting D. same

Phân tích khổ 2 của Viếng lăng bác giúp em với ạ, em đánh giá 5sao

Giupppppppp Em Đề đây ạ Viết các câu sau ở thế khẳng định (+),phủ định (-)và nghi vấn (?)

“Để thành công thì có 1% là tố chất Thoòng minh ,còn 99% là do nghị lực con người”.Em có đồng ý vs ý kiến trên không?hẫy trình bày bằng 1 đoạn văn tổng phân hợp Giúp mik vs đang cần gấp ạ

Tả đoạn văn về mùa hè Tả đoạn văn về mùa xuân

Cho 6,2a (g) Na2O vào 100ml dd HCL 1,5a M. Viết pthh và xác định thành phần chất tan trong dd sau phản ứng