Câu 11: Một con ngựa kéo xe chuyển động đều với lực kéo 800N. Trong 4 phút công thực hiện được là 480KJ. Vận tốc chuyển động của xe là: A. 2,5m/s; B. 150m/s; C. 0,15m/s; D. 25m/s.
Anh chị giúp em với ạ em cho 5 sao
Đốt cháy hoàn toàn 3,1 gam P trong bình chứa 5,6 lít khí oxi thu được sản phẩm là P2O5 a. Viết PTHH xảy ra. b. Sau phản ứng chất nào dư và dư bao nhiêu gam? c. Tính khối lượng P2O5 thu được sau phản ứng.
Trả lời giúp mình nha mn! Mình cảm ơn trước nha!
Question 1: Tom is_________than his brother. A. more tall B. the tallest C. tall D. taller Question 2: We left early__________miss the last train. A. so as not B. in order not C. in order to D. in order not to Question 3: The machine __________if you press this button . A. will stop B. would stop C. stopping D. stop Question 4: You didn’t watch TV last night , ………..? A. didn’t you B. did you C. were you D. do you Question 5: She said she ________Ha Long Bay the following day. A. will visit B. will be visited C. would visit D. would be visited Question 6: He hates _____________at while he is out in the street. A. staring B. be stared C. is stared D. being stared Question 7: If we ______wasting water , there will be a shortage of fresh water in a few decates. A. go out B. go up C. go in D. go on Question 8: Tom : “ Let me congratulate you on passing the final exam” Jane: “………….” A. Yes, let’s B. It’s nice of you to say so C. Not at all D. I’m sorry. I can’t. Question 9: The professor _______course I am taking is excellent. A. that B. who C. whose D. which Question 10: I wish I _______buy a cellphone. A. shall B. will C. can D. could Question 11: Peter: “ Would you like to have dinner with me ?” - Ann: “_________” A. I’m very happy. B. Yes, I do C. Yes, It is D. Yes, I’d love to. Question 12: It’s raining hard , ______________I can’t go to the beach. A. however B. so C. because D. but Question 13: Tomorrow the director will have a meeting _______8.00 to 10.00a.m. A. between B. in C. from D. among Question 14: The Internet is a wonderful invention of modern life. A. invented B. invent C. inventor D. invention Question 15: ______the weather was very bad , we enjoyed our picnic. A. Although B. Despite C. Inspite of D. However Choose the sentence which has the same meaning as the given one from 16 to 20: Question 16: My sister began to play the guitar five years ago. A. My sister has played the guitar for five years B. My sister has played the guitar since five years. C. My sister had played the guitar for five years D. My sister stops playing the guitar now. Question 17: The house has been rebuilt. It was destroyed in the fire last year. A. The house has been rebuilt which was destroyed in the fire last year. B. The house who was destroyed in the fire last year has been rebuilt. C. The house which was destroyed in the fire last year has been rebuilt. D. The house where was destroyedin the fire last year has been rebuilt. Question 18: “W here is the post office?” he asked me. A. He asked me where is the post office. B. He asked me where was the post office. C. He asked me where the post office was. D. He asked me where the post office is. Question 19: You should invite Bill to the party. A. Bill should be invited to the party. B. Bill should be invite to the party. C. Bill should be inviting to the party. D. Bill should invite you to the party. Question 20: I don’t have the key , soI can not get into the house. A. If I have the key , I can get into the house. B. If I had the key, I could get into the house. C. If I had the key, I can get into the house. D. If I had the key, I couldn’t get into the house.
Giúp mình giải 2 bài này với các best văn
Mỗi khẳng định sau đúng hay sai? Vì sao? a) a − 15 >a - 20 với mọi số thực a; b) 3 ( a+ 2)< 3 ( a- 2) với mọi số thực a.
Gíup em với ạ em vote cho 5 sao
Giúp mình với, mình cần gấp các cậu ơiiii
người ta dùng mặt phẳng nghiêng kéo một vật nặng 50kg lên sàn ô tô cách mặt đất 1.5m biết hiệu suất của mặt phẳng nằm nghiêng là 75% tính công phải thực hiện để kéo vật lên ?
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