Tính chiều cao hình thang biết đáy lớn =9cm;đáy bé =7cm.Biết diện tích hình thang là 64cm vuông

Hô hấp là j và vai trò hô hấp giúp e vs ạ

Cho mạch điện R1LR2C mắc nối tiếp theo thứ tự. Với R1 = R2 = 100Ω, cuộn dây thuần cảm. Điện áp hai đầu mạch là u = 100√2cosωt, V. Khi mắc ampe kế vào hai đầu R2C thì ampe kế chỉ \frac{\sqrt{2}}{2} A. Khi mắc vào R2C một vôn kế điện trở rất lớn thì hệ số công suất của mạch đạt giá trị cực đại. Số chỉ của vôn kế là:

Các giai đoạn hô hấp của tế bào

Flo, clo, brom, iot tác dụng với kim loại?

Một vật hình lập phương có cạnh 8cm được nhúng chìm vào trong nước biết D=750kg/m3 d nước =10000N/m3 a) Tính chiều cao phần vật nhô ra khỏi mặt nước b) Tính lực đẩy Acsimet tắc dụng lên vật c) Để vật vừa chìm hoàn toàn trong nước người ta khoét 1 looxrooif sau đó lắp đầy chì biết D=11,3g/m3 .Tính thể tích của phần miệng khoét

Câu hỏi: 1. What did Ba talk about? 2. Who is Liz? 3. When did her family arrive in Ha Noi? 4. What does her father do? 5. Did Ba's family rent ăn aparment next door to Liz's house? 6. When did her family move to a new aparment? Giúp mik vs chiều nay mik cô kt bài...*huhu*

Giúp em bài này với ạ! Cảm ơn nhiều! Cj nhungpham giúp em với! Rearrange the sentences in order to make a meaningful conversation,writing the number(1-8) in each blank.The first 0 has been done for you 0 Mai:Our group will give a presentation about visual pollution.It's the new to me.Do you know what it is,Phong? ......A.Phong:Yes,maybe.Because billboards,litter,or junkyards can also be considered visual pollution .......B.Mai:I hate seeing a man throw an empty eigarttc package from a motorbike or a car.He should be given a fine .......C.Mai:Oh,I see.Can you give some examples of it,Phong? .......D.Phong:That's right.There are rules,or regulations that apply punishment to anyone that makes the surroundings ugly.I dislike seeing to many billboards along the streets.How about you,Mai? .......E.Mai:Can we visual pollution when we walk along the streets? .......F.Phong:Well,visual pollution is anything that makes our neighbourhood unattractive or unpleasant,Mai ........G.Mai:All of us should try to protect the beautiful sight around us.We must have laws or regulations to prtotect our pretty landspace ........H.Phong:Yeah,for example,skycrapers or high buildings that block a natural view,graffiti or carving on the trees or rocks

Câu 1: Sắp xếp: Jonh/ is/ unhappy/ an/ man. Câu 2: II. READING: (4,2pts) Part 1: Read the text below and decide which answer A, B, C or D best fits each space. (1,0pt) As gasoline prices continue to (1)_____, many people are looking for ways to reduce the (2)_____ of higher prices while still doing the driving necessary to their work and other activities. (3)_____ are some suggestions which will save you a (4)_____ amount of money on gasoline. 1. Ask yourself every time you (5)_____ to use your car, truck, SUV, or van, “Is this trip really necessary?” Every mile you drive your vehicle will cost you at least an (6)_____ of 36 cents. If the trip is not necessary, think twice before using your vehicle. 2. Drive at a (7)_____ speed on the highway. According to the Department of Energy, most automobiles get about 20 percent more miles per gallon on the highway at 55 miles per hour than they do at 70 miles per hour. 3. Consider (8)_____ an automobile which gets the best gas mileage. For example, generally, the following get better gas mileage: lighter weight vehicles, vehicles with smaller engines, vehicles with manual transmissions, those with four cylinders, and those with fewer accessories. Check the “fuel economy” labels (9)_____ to the windows of new automobiles to find the average estimated miles per gallon for given makes and models. 4. Decrease the number of short trips you make. Short trips (10)______ reduce gas mileage. If an automobile gets 20 miles per gallon in general, it may get only 4 miles per gallon on a short trip of 5 miles or less. (Adapted from “The Vocabulary Files C1”) 1. A. crash B. accelerate C. escalate D. fly 2. A. danger B. occurrence C. burden D. chance 3. A. Below B. After C. Coming D. Later 4. A. measurable B. negotiable C. negligible D. considerable 5. A. think B. plan C. need D. arrange 6. A. equivalent B. average C. amount D. increase 7. A. mild B. conservative C. considerable D. substantial 8. A. inquiring B. trading C. preferring D. purchasing 9. A. attached B. selected C. stretched D. held 10. A. extensively B. exclusively C. intensively D. drastically

Why do you learn english ? And how many skills are there in learning english? Which skills do you like best?