Đáp án:
Giải thích các bước giải:
Trong một cuộc điều tra tại một trường THCS có 128 học sinh, trong đó có 95 học sinh thích chơi bóng đá, 80 học sinh thích chơi cầu lông. Biết rằng có 8 học sinh không thích chơi cả hai môn thể thao trên, thì có bao nhiêu học sinh thích cả hai môn thể thao trên?
Tìm một số tự nhiên có 4 chữ số khác nhau và chia hết cho 11. Biết rằng, số đó không chứa chữ số 1 và có thể sắp xếp lại vị trí các chữ số của nó để được một số gấp 3 lần số ban đầu.
Bạn Thiện An có 48 bông hoa và muốn chia đều số bông hoa vào các hộp nhỏ để gói quà.Hỏi Thiện An có thể chia đều vào bao nhiêu hộp ? (kể cả trường hợp cho hết hoa vào trường hợp)
I. Find the words which has a different sound in the part underlined. 1. A. convenient B. exciting C. evening D. eve 2. A. spring B. summer C. sugar D. special 3. A. post B. cost C. question D. first 4. A. come B. month C. mother D. open
Cho đường tròn (O;R) và điểm C cố định sao cho OC=2R. Đường kính AB quay quanh (O) sao cho đường thẳng AB không đi qua C. Đường tròn đi qua A,B,C cắt đường thẳng OC tại điểm thứ hai là I. Chứng minh : 1. OC . OI = OB . OA 2. CI có độ dài không đổi Đừng trả lời linh tinh ạ :( giúp mình câu a thôi cũng được
Trộn 30 gam dung dịch HCl 37% với 50 ml dung dịch NaOH 3M thu được dung dịch X. a) viết phương trình phản ứng b) dung dịch X có trong môi trường axit, bazo hay trung tính
I. Choose the best answer A, B, C or D to complete the sentences: 1. I ______________ Tom and Jerry many times. A. see B. saw C. am seeing D. have seen 2. My favorite _______________ is swimming. A. game B. match C. activity D. sport 3. He first _______________Ho Chi Minh City. A. go B. went C. visited D. been to 4. I’d like _______________a picnic. A. have B. has C. having D. to have 5. The Nile River is the _______________river in the world. A. high B. longest C. longer D. highest 6. Lan doesn’t like watching TV. She _______________watches TV. A. always B. usually C. never D. often 7. You can watch Harry Potter on TV________________ you can read it. A. or B. when C. but D. so 8. _________________ do you go to the gym? – By bus. A. What B. How C. Why D. Which 9. If we cut down more forests, there _______________ more floods. A. are B. will have C. been D. will be 10. It’s getting light. Shall I turn _______________ the lights to save electricity. A. off B. on C. up D. in II. Supply the correct tense or form of the verb in parentheses: 1. We (not visit) _____________ Nha Trang yet. 2. Trung is learning to play the guitar. He (have) _______________ guitar lessons twice a week. 3. If it is nice tomorrow, we (plant) ______________ some young trees in our garden. 4. We might (go) _______________ to the Moon for our summer holidays in 2050. 5. I was ill so I (not come) ________________ to school yesterday. PART C: READING I. Read the following passage and put a word in the box in each of the numbered blanks: control turn on change make use Scientists predict the places and the ways we live will (1) ___________ a lot in the future. Our houses in the future will be larger and more eco-friendly. Around our houses, there will be a lot of green trees. We will only (2) ____________ wind energy or solar energy instead of electricity in our houses. We will be able to (3) ____________ our future houses with our voices. We can sit at one place and order everything we want. For example, when it is dark, we will ask to (4) ___________ the lights or TV when we want to watch a programme on it. It will (5) _____________ our lives more comfortable and more interesting. 1_________ 2_________ 3_________ 4___________ 5__________ II. Choose the correct word A, B, C or D for each gap to complete the following passage: Before you travel to the US, you must find out what documents you need. British people do not (1) ____________ to get a visa, but there are different rules for (2) ____________ nationalities. For example, you don’t need to show that you have enough money (3) _________ you. But there is one rule you can be sure about: everyone has to show their passport. The roads in New York are very busy, but don’t worry, you can get around cheaply and easily by subway. Remember that you are not allowed to smoke (4) ___________ public transport or in shops. And don’t forget that you must tip taxi drivers and waiters. New York is not the most dangerous city in the US, but you really shouldn’t walk along empty streets at night. And it is (5) ___________ to travel around in groups. 1. A. ought B. have C. should D. used 2. A. other B. many C. different D. some 3. A. on B. in C. of D. with 4. A. in B. on C. at D. by 5. A. safer B. safe C. safest D. more safe III. Read the following passage and do the tasks below: A lovely house Peter lives in a house near the sea. It’s is an old house, about 100 years old, and it’s very small. There are two bedrooms upstairs but no bathroom. The bathroom is downstairs next to the kitchen and there’s a living room where there’s a lovely fireplace. There’s a garden in front of the house. The garden goes down to the beach and in spring and summer there are flowers everywhere. Peter lives alone with his dog, Boxer, but they have a lot of visitors. Their city friends often stay with them. Peter loves his house for many reasons: the garden, the flowers in the summer, the fireplace in winter, but the best thing is the view from his bedroom window. Peter is thinking of a new house in the future with the help of Robots. A. True (T) or False (F): Statement T F 1. Peter’s house is far from the sea. 2. The house is behind the garden. B. Answer the questions: 1. How many rooms are there upstairs? =>___________________________________________________________________ 2. Is there a bathroom upstairs? =>___________________________________________________________________ 3. Who often come to stay with them? =>____________________________________________________________________
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