Work có phải là một danh từ đếm được ko?

Cho mạch điện như hình vẽ bỏ qua điện trở của ampeke và các đoạn dây nối. Cho biết U=16V, R0=4 ôm, R1=12 ôm, Rx là giá trị biến trở a) Tính Rx sao cho công suất tiêu thụ trên nó bằng 9W và tính hiệu suất của đoạn mạch AB biết rằng tiêu hao năng lượng trên R1,Rx là có ích trên R0 là vô ích b) Với giá trị nào của biến thì công suất tiêu thụ trên cực đại. Tính công suất đó. MOD TRỢ GIÚPPPPPPPPPPPPPP

VIII. Choose the best anwer to fill in each the blank. How many floors..............in your school? A. there are B. there has C. are there D. have there 2. Does Nga play volleyball? No, .................. A. she not plays B. she don't C. she isn't D. she doesn't 3. ................do you go to school? I walk A. How B. By what C. How many D. How by 4. My sister and I ............television in the living room now. A. am watching B.are watching C. is watching D.watching 5. Nam is ................something on his book. A. writing B. wite C. wrote D. writes 6. Are there ..................stores on the street? A. a B. an C. any D. the 7. They are going to New York .........plane. A. in B. by C. with D. on 8. This sign says "stop". We...................go straight ahead. A. can B. don't can C. must D. must not 9. Hoa and I................badminton in the yard. A. playing B. is playing C. are playing D. am playing 10. It's twelve o'clock. Let's ..................home. A. go B. to go C. going D. goes I. Circle the best answer: How many …………..… can you speak? A. languages B. countries C. people D. speeches. 2. How big is Singapore? - It’s much……………..… than Malaysia. A. small B. smaller C. smallest D the smallest 3. This is …….… longest river in the world. A. the B. a C. an D. most 4. ……………..… are you going to travel there? - Let’s call a taxi. A. What B. How C. Where D. Why 5. I’m going to visit my uncle……………..… Saturday moning. A. in B. at C. about D. on 6. You should not sit and ……………..… television all evenings. A. look ` B. see C. watch D. visit 7. She likes ……………..… in the forest when it’s cool. A. walk B. walking C. walks D. to walking 8. We need a tent to go ……………..… A. fishing B. jogging C. camping D. swimming. 9. How ……………..… money do you often send to him? A. often B. many C. far D. much 10. The opposite of “weak” is…………… A. thin B. fat C. big D. strong Many.....................come to Hue everyday. A. visitors B. visit C. visiting D. to visit. ............collecting the empty bottles? -Yes, Good idea. A. Let's B. What C.What about D.Why don't we .....................milk does Mr. Hai produce every day? A. How B. How many C. How much D. How far She speaks....................very well. A. Chinese B. China C. the Chinese D. a Chinese Mai doesn’t like playing soccer. She .....................plays soccer A. always B. never C. usually D. often They ...........visit the citadel in Hue next month. A. are going B.is going to C.are going to D.are We..........recycle waste things in the factory. A. should B. should to C. shouldn't to D. ought Let's go fishing .....................the morning. A. at B. in C. on D. to Nam doesn’t want .....................coffee. A. a B. some C. any D. an It's seven thirty and Minh is late.....................school. A. to B. at C. for D. in

vẽ đậu mầm nha nl:ai fan alan walker hum

cho n và dãy a1,a2...an. Tìm các vị trí i(nếu có) chia dãy số thành 2 phần có tổng bằng nhau. Nếu không ghi ra -1 dùng free pascal

thuyết trình về các chủ đề liên quan đến Covid-19 (Gợi ý: Ảnh hưởng của Covid-19 đến học tập, cuộc sống; hoặc Những hình ảnh, nghĩa cử cao đẹp trong thời kỳ dịch bệnh; Sự sẻ chia, lòng biết ơn đến các y bác sĩ, các lực lượng đang thực hiện nhiệm vụ phòng, chống dịch Covid-19…) giúp mikf với

Vẽ 2 hình anime nam giúp mik nhé 1/ Đẹp trai 2/ Ngầu, lạnh lùng #Tuyệt đối ko vẽ GÁI nhé!

Giúp mình với cảm ơn mn trước nha

V. Supply the correct verb forms: Lan is in grade 6 and she (learn)…………………. at Hung Vuong school now. Mr Phong (drive)………………………. his truck to our farm everyday. You can (park)……………………. here. Mary (not work)………………….. today because it’s Sunday. How………….. she (go)………….… to school everyday? Question IV. Choose the word whose underlined part is pronounced differently…: 1. A. house B. our C. four D. about 2. A. live B. his C. dinner D. fine 3. A be B. the C. he D. Vietnamese 4. A. son B. come C. home D. mother 5. A. no B.cold C. old D. doctor 6. A. has B. name C. family D. lamp 7. A. do B. brother C. two D. to 8. A. tall B. fat C. cat D. hat VII. Matching the sentences in columnA with the suitable ones in column B: A B 1.When are you going to have your holidays? a/ I like the white ones. 2. Can you please tell me the way to the station? b/ Here you are. 3. Do you like the white or the black shoes? c/ In July I think. 4. How many eggs do you want? d/ Go straight then turn left. 5. Where are your parents now? e/ half a dozen please. 6. Please give me a glass of water? f/ They are watching TV in the sitting room. 7. What colour is your shirt? g/ She is eleven years old. 8. How old is your sister? h/ It is pink

(1/2) lũy thừa bậc 3= bao nhiêu ạ