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thainhatle2002
2 năm trước
Câu 1: Phân biệt oxit axit và oxit bazơ và đọc tên: MgO, Al2O3, CaO, SO2, SO3 , CuO, K2O, ZnO, Fe2O3, SO2, P2O5 Câu 2: Đốt cháy 1kg than đá có chứa 4% tạp chất S, 96% C. Tính thể tích O2 cần dùng ở đktc.
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TRẮC NGIỆM FIRST TIME IN THE AIR When John Mills was going to fly in an airplane for the firsttime, he was frightened. He did not like the idea of being thousands of feet up in the air. "I also didn't like the fact that I wouldn't be in control," says John."I'm a terrible passenger in the car. When somebody else is driving, I tell them what to so. It drives ever ybody crazy. "However John coul dn't avoid flyin g any longer. It was the only way he could visit his grandchildren in Canada. "I had made up my mind that I was going to do it, I couldn' t let my son, his wife and their three children travel all the way here to visit me. It would be so expensive for them and I know Tom's businessisn't doing so well at the moment - it would also be tiring for the children - it's a nine-hour flight!" he says.To get ready for the flight John did lots of reading about airplanes. When he booked his seat, he was told that he would be flying on a Boeing 747, which is better known as a jumbo jet. "I needed to know as much as possible before getting in that plane. I suppose it was a way of making myself feel better. The Boeing 747 is the largest passenger aircraft in the world at the moment.The first one flew on February 9th 1969 in the USA. I t can carry up to 524 passengers and 3.400 pieces of luggage. The fuel for airplanes is kept in the wings and the 747' s wings are so big that they can carry enough fuel for an average car to be able to travel 16,000 kilometers a year for 70 years. Isn' t that unbelievable? Even though I had discovered all this very interesting information about the jumbo, when I saw it for the first time, just before I was going to travel to Canada, I still couldn't believe that something so enormous was going to get up in the air and fl y. I was even more impressed when I saw how big it was inside with hundreds of people!" The biggest surprise of all for John was the flight itself. "The take-off itself was much smoother than I expected although I was still quite scared until we were in the air. In the end, I managed to relax, enjoy the food and watch one of the movies and the view from the window was spectacular. I even managed to sleep for a while! "Of course, " continues John, "the best reward of all was when I arrived i n Canada and saw my son and his famil y, parti cul arl y my beautiful gr andchildren. Suddenl y, I felt so sill y about all the years when I couldn't even think of getting on a plane. I had let my fear of living stop me from seeing the people I love most in the world. I can visit my son and famil y as often as I like now!" Question 24: Why did John Mills fly in an airplane? A. He wanted to go on holiday B. He wanted to try it. C. He wanted to see his family D. He had to travel on business. Question 25: Why did John read about airplane? A. He wanted to know how they work. B. I t was his hobby. C. I t made him fee l safer . D. He had found a book on them. Question 26: What does the word "which" in the paragraph refer to? A. reading about airplanes B. booking his seat C. f ly ing on a Boe ing 747 D. a Boeing 747 Question 27: What happened when he saw the jumbo jet for the first time? A. He felt much safer . B. He liked the shape of it. C. He couldn't believe how big it was. D. He thought the wings were ver y small. Question 28: How did John feel when the airpl ane was taking off? A. excited B. happy C. s a d D. frightened Question 29: What surprised John most about the fli ght? A. that he liked the food. B. that he was able to sleep C. that there was a movie being shown D. that the view was good Question 30: How did John feel about his fears in the end? A. He thought he had wasted time being afraid. B. He realized it was okay to be afraid. C. He hoped his grandchildren weren't afraid of flyi ng. D. He realized that being afraid kept him safe.

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