CO2 vì đây là chất khí không cung cấp duy trì sự sống và nếu thành phần nồng độ nhiều hơn không khí sẽ gây chết ngạt
Đáp án:
CO2
Giải thích các bước giải:
Quá trình nổ máy là quá trình đốt cháy xăng dầu, tiêu tốn O2 và sinh ra khí CO, CO2 độc hại VÀ GÂY RA HIỆN TƯỢNG NGẠT
1 Although he eats too much every day, he can't be fatter In spite___________________________________________________ 2 Though French is very difficult, he still keeps learning it In spite__________________________________________________ 3 Although he worked hard, he couldn't earn much money Despite_____________________________________________________ 4 Everybody has a great regard despite her poverty Although_________________________________________________ 5 Though it was rainy, they decided to go climbing Despite______________________________________________ 6 Despite the narrow streets, many people drive cars Though_________________________________________________ 7 She didn't go outside because she had a bad cold Because of___________________________________________ 8 She stayed at home because her mother was sick Becuase of___________________________________________ 9 I like him because his father is very kind to me Because of____________________________________________ 10 I couldn't do the test because it was very difficult Because of___________________________________________ 11 I couldn't do the test because it was so complicated Because of____________________________________________ 12 we arrived there late because of the bad traffic Because___________________________________________ 13 he couldn't sleep every day because of his worries Because______________________________________________ 14 he is tired because of staying up late last night Because______________________________________________
Câu 3: Trong mạch điện có sơ đồ như hình 28.5, ampe kế có số chỉ I = 0,54A. Biết cường độ dòng điện đi qua đèn Đ1 lớn gấp hai lần cường độ dòng điện đi qua đèn Đ2. a) Hãy tính cường độ dòng điện l1 và I2 tương ứng đi qua các đèn Đi và Đ2. b) Hãy so sánh hiệu điện thế giữa hai đầu các đèn Đi và Đ2.
Làm giùm mình vs ạ mình đag cần gấp ạ
Question33: A good dictionary tells you how you should pronounce the words. A good dictionary …………………………………………………………………... Question34: Maria is slowly recovering from her illness. Maria is slowly ……………………………………………………………….…… Question35: “ If I were you , I would tell this news to him” Mary advised ……………………………………………………………………… Question36: I have never read such as interesting novel as The Little Prince. “The Little Prince” ……………………………………………..…………………. Question37: Tom gets up early. He doesn't want to be late for school. (in order ) ………………………………………………………………………………………… Question38: There wasn’t much food at the party. However, everybody had a good time. …………………………………………………………………………………(Although) Question39: They did their job well. They hoped the boss would increase their salary. ………………………………………………………………………………. (so that) Question40: I don’t get many opportunities to practice my English. I find it difficult to remember everything I study. (therefore) …………………………………………………………………………………………
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8 848 giây = giờ phút giâ
cho a,b,c là các số nguyên dương sao cho mỗi số nhỏ hơn tổng của hai số kia. Chứng minh rằng: a/b+c + b/c+a + c/b+a < 2
Một người đi xe đạp 18 phút được 3km. hỏi đi được 156 phút có bn km
Question1: She's doing a comparative study of health in inner cities and rural areas. A. urban B. coastal C. mountainous D. suburban Question2: Police are searching the area in the hope of finding the missing boy A. anxiety B. despair C. ambition D. expectation Question3: I find it hard to write …………… time pressure. A. down B. under C. with D. on Question4: The campaign has certainly succeeded in ……… public awareness of the issue. A. raising B. lifting C. rising D. picking up Question5: Every advanced nation has strict regulations to protect endangered ………….. A. species B. class C. group D. type Question6: ……………, ingenuity and flair are the song writer’s real talents. A. Creation B. Creative C. Creativity D. Creativeness Question7: Even a low level of noise interferes …………… my concentration. A. off B. on C. in D. with Question8: Not only …………… give you the experience of meeting a number of very interesting personalities, it will also take you to many interesting places. A. do reading these stories B. will reading these stories C. these stories will D. reading these stories Question9: They got …………… the bus in Obdland Village and walked up the road. A. out B. in C. on D. off Question10: There’s increasing demand for cars which are more ……………… A. economic B. economics C. economical D. economy Question11: I have …………… with most of my secondary school friends. A. conversation B. contact C. connection D. communication Question12:When the company has to close because of economic difficulties,he becomes... A. redundant B. inconsiderable C. unsatisfactory D. deliberate Question13:-“Those students will perform the annual school play.” -“Yes, it is …next week” A. due B. put on C. time-tabled D. scheduled Question14: It’s a long journey by train, it’s much ……….. by road. A. more quickly B. more quick C. quickly D. quicker Question15: Only ………. research has been carried out in this field. A. a few B. few C. not much D. a little Question16: Do you ………... my turning the television on now? A. mind B. want C. object D. disapprove Question17: I don’t like doing the ……….. , especially cleaning the windows. A. homework B. occupation C. housework D. jobs Question18: She asked me ………… speak Russian A. I can B. if I could C. I could D. if I can Question19 You can’t speak Russian. …………. A. Either I can B. Neither can’t I C. Neither can I D. I can’t neither Question20: Your car is very ………. . It hardly uses any petrol at all. A. ecological B. economical C. saving D. economic
Cứu đii mn lẹ điiiiiiii 2 phút nữa á
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