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fbxl333
2 năm trước
Cho 12 gam hỗn hợp hai kim loại gồm Fe và Cu vào dung dịch H2SO4 loãng dư thu được 2,24 lít khí H2(đktc). Thành phần phần trăm về khối lượng của mỗi nguyên tố trong hỗn hợp ban đầu là 46,7% và 53,3% 53,3% và 46,7% 57,6 % và 42,4% 42,4% và 57,6%
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Read the passage and choose the best answer. My name is Smith and fishing is my favorite sport. I often go fishing for hours without catching anything. But this doesn’t worry me. Some fishermen are unlucky. Instead of catching anything, not even old boots. After spending the whole morning on the river, I always go home with an empty bag. “You should give up fishing”, my friends said. “It’s a waste of time”. But they don’t know that I’m not really interested in fishing. I’m only interested in sitting in a boat and doing nothing at all! 6. When he is fishing, he often catches ...................... A. old boots B. rubbish C. a lot of fish D. nothing 7. When does he usually go fishing? A. in the morning B. in the evening C. in the afternoon D. at noon 8. What do Smith’s friends advise him? A. go fishing at night B. stop fishing C. spend more time on fishing D. spend less time on fishing 9. Where does Smith sit to fish? A. on the river bank B. in a boat C. at a large lake D. in the sea 10. What does Smith do when he fishes? A. Read books B. Listen to music C. Does nothing D. Talks to other fishermen

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