để đốt cháy hoàn toàn 0.672gam kim loại R chỉ cần dùng 80% lượng oxi sinh ra khi phân hủy 5.53gam kmno4 hãy xác định kim loại R ?

II. Read the passage then choose the best answers for the following questions: A: In Britain, the climate is not very good. There are very few hot days and it rains a lot. Because of this, people spend a lot of time at home. Generally, British homes have a lot of furniture in them, carpets on the floors and heavy curtains. Many houses in Britain are old. Many of them are over one hundred years old. Often, they do not have enough insulation and the heat goes out through the windows, the doors and up the chimney. Because of the climate, people in Britain have to spend a lot of money on heating. Many houses have a special system called "central heating". This heats all the rooms and, at the same time, heats the hot water. Houses without central heating often have gas, electric or coal fires. The rooms in most British houses are quite small. New houses are much better. They have two layers of glass in the windows to stop the heat going out. 1. Why do British people spend a lot of time at home? A.Because the climate is not very good. B.Because they don’t know where to go. C. Because the climate is very good. D. Because they want to stay at home. 2. The heat goes out of the houses through ___________. A. the doors and up the chimney; B. the windows and up the chimney C. the windows, the doors and up the chimney ; D. the walls and up the chimney 3. Because of __, people in Britain have to spend a lot of money on heating. A. cold weather B.cool weather C.hot weather D.bad weather 4. Houses without central heating often have ___________. A. only coal fires; B.gas or coal fires; C.electric or coal fires; D.gas,electric or coal fires 5. New houses usually have ___in the windows to stop the heat going out. A. one layer of glass B.two layers of glass C.three layers of glass D.two or three layers of glass B: My name is Ewa and I come from Warsaw in Poland. I have a lot of hobbies and interests. At school I play tennis and volleyball, and I sometimes go swimming with my friends. I enjoy traveling and meeting people. I want to go to the United States, especially Hollywood, because I’m very interested in movies, and I enjoy reading about famous movie stars. My favorite hobby is listening to pop music because I like dancing. My favorite singer is George Michael. I like him because he is really good – looking and he sings well. 1. What sports does Ewa play at school? A. Tennis B. Volleyball C. swimming D. Tennis and volleyball 2. Does she enjoy traveling and meeting people? A. Yes, she doesn’t; B. No, she does; C. Yes, she does ; D. No, she doesn’t 3. Why does she want to go to the USA? – Because she ____________. A. is very interested in movies. B. likes dancing B. C. enjoy foreign travels D. comes from Warsaw. 4. What is her favorite hobby? A. listening to pop music ; B. going swimming;C.watching; D.meeting people 5. How does George Michael sing? – He sings ____________. A. interesting B. good C. well D. famous III. Choose the best answer to complete the text: Headache is a very common disease in the USA. Every......(1)......, about fifty million people have to go to the..... (2)..... because of headache. The symptoms of a headache are various. People can see black dots or bright spots in front of their eyes. They may also have pains only on one side of the head. Sometimes when the pain goes away, the head is sore. People have headache when they......(3)......too hard or they are too nervous about something. Medicine can help cure the disease but people usually have to do more than taking tablets. They can prevent headaches by changing their.....(4)..... or their lifestyle or simply by going to bed. 1. a. year b. month c. week d. day 2. a. dentist b. doctor c. clinic d. office 3. a. learn b. study c. do d.work 4 . a. drinks b. eats c. diets d. have IV. Read the text: Last summer, Mary and her parents went to Colorado for their vacation. They visited a national park, where they camped in their tent for a week. They went fishing one morning. Mary’s mother caught a very big fish, but her father didn’t catch anything. They enjoyed cooking and eating the fish for dinner. It was delicious. She likes fresh fish very much. a/Decide True(T) or False(F) statements: 1. Today, Mary and her parents went to Colorado for their vacation. 2. Mary’s mother caught a very big fish 3. They enjoyed cooking and eating the fish for lunch 4. She likes fresh fish very much b/Answer the questions: 1. Where did Mary and her parents go for .......... 2. Did they go fishing ?....,.....

Nếu được làm họa sĩ Em sẽ vẽ bức tranh gì cho cuộc sống xã hội hôm nay Hãy viết thành một bài văn ngắn

em sẽ làm gì để văn chương mãi gây dựng và nuôi dưỡng những tình cảm ta không có và sẵn có ( viết khoảng 8 câu )

Mọi người vẽ xử nữ phong cách cổ trang nhé

mọi người giúp mik môn t.anh với ạ là xong r mik sẽ tặng 5* + CTLHN + cảm ơn ạ

BÀI 1 tính hợp lý a;125.(-61).(-2)^3.(-1)^2 b; (-48).72+36.(-304) c; (-7)^3.2^4 d;5^4.(-4)^2 e: -|-17|+2[24:(-8)+(-5)^2 f: -|-7|.[(-2)^4+(-36):

nhờ mn người giải hộ e vs ạ gấp gấp gấp!

Giúp mk vs mk đang cần gấp .Cảm ơn.

Chỉ ra và phân tích tác dụng của phép tu từ trong câu đối " Nhà cửa để lầm than, con thơ dại lấy ai rèn cặp Cơ đồ đành bỏ bễ, vợ trẻ trung lắm kể đe loi"