Đáp án:
B
Giải thích các bước giải:
\(\begin{array}{l}2NaOH + {H_2}S \to N{a_2}S + 2{H_2}O\\2{H_2}S + 3{O_2} \to 2S{O_2} + 2{H_2}O\\{H_2}S + B{r_2} \to S + 2HBr\\CuC{l_2} + {H_2}S \to CuS + 2HCl\end{array}\)
Our school has an organic garden. We learn about growing vegetables and looking after them in our food science lessons . on the holidays , we can volunteer to work in the garden. My family live in a flat so it's great for me to have a garden at school. Volunteers can take some vegetables home too , so my parents are very happy that l like working there. My aunt and uncle live on a farm in the Red River Delta. lt isn't very big but they have hens , pigs and nows. We always go to stay with them in summer. lt's a beautiful place and the food is amazing. All the vegetables are so fresh because the farm is organic, we know they are healthy, too. We live in Ha Noi and my parents buy food at The Viet Fresh Farm Shop near our flat. lt is very famous in our city and all the food they sell is from animals that live on the farm or vegetables that they grow. They organise a food festival once a year and we always go to eat the food and watch cookery demonstrations. They are really interesting anf you can learn a lot about cooking. A.Match the underlined words in the passage with the correct meanings (1-5) 1.very good .................................. 2.something or someone that o lot of people know about ............... 3.people working or helping because they want to , not for money ....... 4.activities which explain and show how to do something ................... 5.offer to do something for no money .......................... B.Choose the best answer to each questions. 6.The students at the school ......................... A.have to work in the school garden B.get some free food for working in the garden C.have food science lessons during the holidays D.use the vegetables from the garden in cookery lessons 7.The student who wrote about the school garden ........................... A.works there with her parents B.also helps in her parent's garden C.would like to work there in summer but she can't D.doesn't have a garden at home 8.We know that the student who writes about the farm of her aunt anf uncle certainly........................ A.goes there every year B.helps on the farm C. likes eating meat from the farm D.eats only healthy food 9.The Viet Fresh Farm Shop ........................ A.is the best farm shop in Ha Noi B.is famous all over Viet Nam C.likes eating meat from the farm D.only sells food from their farm 10.lf you go to The Viet Fresh Farm food festival you .................. A.have to pay for the food B.can watch how to cook different dishes C.see animals from the farm D.have to take food to sell
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UNIT 7: POLLUTION. 1. How many types of pollution do you know? 2. What types of pollution do your neighborhood sufer? 3. What should you do to reduce pollution? UNIT 8:ENGLISH SPEAKING COUNTRIES. 1. 2. Which english speaking country would you like to visit?Why? 3. What would you do there? 4. Name some english speaking countries you know? 5 . What do you know about english speaking countries you know? UNIT 9: NATURAL DISASTERS 1. Name some natural diaster you know? 2. What types of natural diaster does VIET NAM have to face with?When? 3. What should you do before storm/flood? 4 What should you do after storm/flood?
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