Cuộn sơ cấp của máy biến thế có 4500 vòng, cuộn thứ cấp có 250 vòng. Khi đặt vào hai đầu của cuộn sơ cấp một hiệu điện thế xoay chiều 220V thì ở hai đầu cuộn dây thứ cấp có hiệu điện thế là bao nhiêu?

Giải gió minh với mình đang cân gấp mai mình thi rồi

đốt cháy hoàn toàn hỗn hợp A gồm CH4,C2H2, C3H4, C4H6 thu được x mol CO2 và 18x gam H2O. Phần trăm thể tích của CH4 trong A là bao nhiêu?

tính : 1 )13 -18 -(-42) - 15 2 ) 369-4[(-5)+4.(-8) 3 ) (-8)^3 : (-8)^2 +8 4 ) (-12).(-13)+13.(-29) 5 ) 17-11-14-(-39) 6 ) 125 - 4 [ 3-7.(-2) 7 ) (-2)^7 : (-2)^4 + 8 8 ) (-14) .9 - 13.(-9) 9 ) -2-13+(-14)-19 10 ) 221 + 4[(-5).8-4] II Tìm x thuộc 1 ) (x - 5 )(x+6)=0 2 ) (x+2)(x-9)=0

Phép tu từ được sử dụng trong bài thơ khi con tu hú

gup minh voi 2. _____________ do you prefer to study - at night or in the morning? 3. _____________ do you prefer - wine or beer? 4. _____________ does this lesson finish? 5. _____________ is the best student in this class? 6. _____________ coffee do you drink every day? 7. _____________ is the time? 8. _____________ is the weather like today? 9. _____________ don't you like apple juice? 10._____________ about a walk through the forest? 11._____________ do you play volleyball? 12._____________ do Anne and Betty get to school every day? 13._____________ does your father go to work? 14._____________ are we going for a holiday by the sea again? 15._____________ do you like your coffee? Bài 2: Chọn đáp án đúng nhất để điền vào chổ trống. 1. Do you know _______ language is spoken in Kenya? A. Which B. Who C. What D. How 2. _______ is your blood type? A. Which B. Who C. What D. How 3. _______ do you play tennis? For exercise. A. Which B. Who C. What D. Why 4. _______ can I buy some milk? At the supermarket. A. Which B. Where C. What D. How 5. _______ much do you weigh? A. Which B. Who C. What D. How 6. _______ hat is this? It's my brother’s. A. Which B. Who C. What D. Whose 7. _______ can I park my car? Over there. A. Where B. Who C. What D. How 8. _______ tall are you? A. Which B. Who C. What D. How 9. _______ do you like your tea? I like it with cream and sugar. A. Which B. Who C. What D. How 10. _______ picture do you prefer, this one or that one? A. Which B. Who C. What D. How 11._______ is that woman? - I think she is a teacher. A. Which B. Who C. What D. How 12._______ book is this? It’s mine. A. Which B. Who C. What D. Whose 13._______ do you usually eat lunch? At noon. A. Which B. Who C. What D. When 14._______ does your father work? At City Hall. A. Which B. Where C. What D. How 15._______ usually gets up the earliest in your family? A. Which B. Who C. What D. How 16._______ do you think of this hotel? It’s pretty good. A. Which B. Who C. What D. How 17._______ does your father work at that company? Because it’s near our house 2 A. Which B. Why C. What D. How 18._______ dances the best in your family? A. Which B. Who C. What D. How Bài 3: Tìm và sửa lỗi sai trong các câu sau. 1. What (does) you like? => ___________________________________________________ 2. Whoes computer do they often use? => ___________________________________________________ 3. Where do that boy come from? => ___________________________________________________ 4. When you do go to the office? => ___________________________________________________ 5. Does why your brother like that film? => ___________________________________________________ 6. Who you usually study with? => ___________________________________________________ 7. How does Susan comes home? => ___________________________________________________ 8. Does Roger play tennis how often? => ___________________________________________________ 9. Does you always run to school why? => ___________________________________________________ 10.Where are you park your bike? => ___________________________________________________ Bài 4: Dựa vào câu trả lời ,chọn Wh-word phù hợp điền vào chỗ trống . 1. ___________ do you want to eat? Pasta and cheese. 2. ___________ does John go to the beach? By car. 3. ___________ floors does your school have? Four. 4. ___________ do we get up? Early in the morning. 5. ___________ did your family go swimming yesterday? At the club. 6. ___________ do you usually eat for breakfast? - Toast and eggs. 7. ___________ does Peter come from? - London. 8. ___________ do you usually have lunch with? - My friends. 9. ___________ do they go to school? - In the morning. 10.___________ does Mary come to class? - By bus. 11.___________ do your sister and you usually get up? - Ten o’clock. 12.___________ ice cream does Johnny like? - Chocolate. 13.___________ cap do you often borrow? - My brother’s (cap). 14.___________ does she sometimes come to work late? - Because she misses the train. 15.___________ do you go shopping? - Once a week. 16.___________ is good at English? Tom. 17.___________ old is her son? Seven. 18.___________ are your posters? Over my bed. 19.___________ much is this pullover? Twenty pounds. 20.___________ colour is your car? Red. Bài 5: Sắp xếp các từ sau để tạo thành câu hoàn chỉnh. 1. they /what /doing /are ______________________________________________________ 2. up /get /you /when /in /the /morning /do ______________________________________________________ 3. /name /you /do /spell /how /your ______________________________________________________ 4. homework /is /what /for ______________________________________________________ 5. does /Tim /like /handball /why __________________________________________

Chứng minh rằng phương trình a+3 + |a+1|=2 nghiệm đúng với mọi (a+1)≤0.

Giúp tôi vói tôi đang cần gấp ai trả lời đc hết tôi rất cảm ơn

cho biết ý nghĩa kinh tế của kênh đào pa-na-ma

tìm phép so sánh có trong đoạn trích thuyền chúng tôi chèo qua kênh .......