Đáp án + Giải thích các bước giải:
Khoảng cách từ nhà Minh đến nhà Hưng là:
$\sqrt{32^2 + 24^2}$ = `40`(km)
Đ/S: `40`km
Cho biết a=2+√3 và b=2-√3.tìm giá trị biểu thức P=a+b-ab
cho x > 0. Tìm GTNN của A = 4x^2 -3x + (1/4x) +2016
. Hoà tan hoàn toàn m gam Na vào 1 lít dung dịch HCl a M, thu được dung dịch A và a(mol) khí thoát ra. Dãy gồm các chất đều tác dụng với dung dịch A là A. Fe, AgNO3, Na2CO3, CaCO3. B. AgNO3, Cl2, HCl C. Mg, ZnO, Na2CO3, NaOH. D. Al, BaCl2, NH4NO3, Na2HPO3 cần gấp ạk
lũy thừa bậc 3 của 3 số là -1009.Biết tỷ số giữa số thứ 1 và số thứ 2 là 2/3,giữa số thứ 1 và số thứ 3 là 4/9,tìm 3 số đó .Ai giải đc mình hứa sẽ vote 5 sao
Chọn câu nào ạ? Cảm ơn nhiều ạ
giup mk voi mn ak. minh cam on
Giúp e 7 câu này e cảm ơn........
Ex 1: Choose A, B, C or D to complete the following passage: Clothes can tell a lot (1)………a person. Some people like very colorful clothes because they want everyone (2)…………at them and they want to be the center of things. (3)………. people like to wear nice clothes, but their clothes are not (4)…………..or fancy. They do not like people (5)………….. Clothes today are very different (6)………… the clothes of the 1800s. One difference is the way they look. For example, in the 1800s, all women (7)………… dress. The dresses all had long skirts. But today, women do not always wear dresses with skirts. Sometimes they wear short skirts. Sometimes they wear pants. Another difference between 1800 and today is the (8)…….. In the 1800s, people(9) ………..clothes by natural kinds of cloth. They were from cotton, wool, silk on linen. But today, there are (10)………. kinds of man made cloth. A lot of clothes are now made from nylon, rayon or polyester. 1. A. aboutB. at C. withD. on 2. A. lookB. to lookC. lookedD. looking 3. A. each otherB. anotherC. othersD. other 4. A. colorB. colorfullyC. colorfulD. colored 5. A. to look at themB. to looking at themC. looking at themD. looked at them 6. A. atB. toC. fromD. in 7. A. wearB. wornC. woreD. wearing 8. A. clothB. clothingC. clotheD. clothes 9. A. were made B. make C.maked D. were making 10. A. manyB. muchC. any D. a little Ex 2 : Choose A, B, C or D to complete the following passage: A TRIP TO VIET NAM Paul had a very exciting summer holiday this year. His Vietnamese pen-friend invited him to visit her family in the north of Viet Nam. Paul(1)…………....by plane from London to Ha Noi. Minh, his Vietnamese friend,(2)………….... him in Ha Noi and together they took a train from Ha Noi to Sapa. Sapa is the(3)………….... where Minh’s family lives. It is not very large. A lot of people live in Sapa and (4)…………....are many interesting shops and cafes there. Paul started Vietnamese at school two years ago and he spoke Vietnamese all the time with Minh and his family. (5)………….....it was very difficult for him but soon it became(6)…………....easier. One day Minh and his parents(7)………….... Paul for a picnic in the mountains. They climbed a big hill called Fansipan . From the top of the hill, they had a wonderful(8)………….... In the (9)………….... they could see the whole city of Sapa. Paul was very sad when it was time to go back to London and school. He is already looking (10)…………..... to next summer when Minh is going to spend his holidays with Paul’s family in England. 1. A. gotB. movedC. wentD. transferred 2. A. metB. sawC. tookD. greeted 3. A. countryB. townC. capitalD. village 4. A. theyB. thoseC. theseD. there 5. A. At firstB. At beginningC. At startingD. At first time 6. A. muchB. soC. tooD. extremely 7. A. broughtB. tookC. carriedD. got 8. A. viewB. sight C. scene D. scenery 9. A. spaceB. airC. distanceD. way 10. A. throughB. forward C. onD. out
Alaska is perhaps the most amazing state in the USA. It has coastlines facing both the Arctic Ocean and the Pacific Ocean. This state has an incredible three million lakes. That’s four lakes per person living there. Many cities in Alaska cannot be reached by road, sea, or river. The only way to get in and out is by air, on foot, or by dogsled. That’s why Alaska has the busiest sea airport in the world, Lake Hood Seaplane Base. Nearly two hundred floatplanes take off and land on the water of this airport every day. It’s really a fun scene to watch. Alaska is called the Land of the Midnight Sun because in summer, the sun does not set for nearly three months. But in winter the sun stays almost unseen. All Alaskans take special pride in their beautiful and unique state. 1.Alaska ______________. A. is another name for the USA B. is an island in the Pacific Ocean C.has coastlines facing both the Pacific and the Arctic Oceans 2.Which statement below is NOT correct? A. In Alaska, the number of lakes is bigger than that of people. B. There is one lake for each person living there. C. Alaska has an incredibly high number of lakes. 3. Which method below can always be used to reach a place in Alaska? A. by air B. by road C. by river 4. In Alaska we can always see the sun __________. A. in winter B. in summer C.every month of the year
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