Cho tam giác ABC cân tại A có đường trung tuyến AM 

a)  Chứng minh AM vuông góc BC

b)  Biết AB=10cm, BC= 12cm, đường trung tuyến BM,  trọng tâm G. Tính độ dài GM

Từ độ cao 30m so với mặt đất,một vật được ném thẳg đứng lên cao với vận tốc 10m/s Bỏ qua sức cản của không khí,lấy g=10m/s².

a.Khi vật ở độ cao nào so với mặt đất thì vật có động năg bằng thế năg.

b.Xác định vận tốc của vật tại vị trí vật có độ cao là 5m

Cho tứ giác ABCDABCD có BCDˆ=5DABˆ,ADCˆ=ABCˆ=90∘,BC=103–√cmBCD^=5DAB^,ADC^=ABC^=90∘,BC=103cm và CD=20cm.CD=20cm. Biết rằng diện tích của tứ giác ABCDABCD bằng m3–√cm2,m3cm2, tìm m.m.

a.  3xy *√2/xy (với xy>0)

b. a +√ab/√a+√b.

-Đôi chân nào giúp thỏ thực hiện động Tác bật nhảy ? 

-Tai Thỏ có đặc điểm gì?

-khi gặp nguy hiểm thỏ sẽ di chuyển bằng hình thức nào? 

-Toàn bộ cơ thể thỏ được phủ bằng gì? 

?

-Đôi chân nào giúp thỏ thực hiện động Tác bật nhảy ? 

-Tai Thỏ có đặc điểm gì?

-khi gặp nguy hiểm thỏ sẽ di chuyển bằng hình thức nào? 

-Toàn bộ cơ thể thỏ được phủ bằng gì? 

?

cho tam giác vuông ABC, góc A=90°, cạnh BC=17cm, góc B=35°.

tính cạnh AC,AB và góc C

Nguyên tắc để làm tăng giảm áp suất là ?

Ví dụ?

Tìm hiểu về những nét tương đồng và khác biệt của các quốc gia Đông Nam Á:

+Vị trí địa lí 

+Hình dạng lãnh thổ 

1+1=?

2,cho m g NaOH phản ứng hết với 400g CuSO4 20% thu đc Cu(OH)2

a,Tính m

b,Tính a

cho 6,5g Zn tác dụng hết với 400g dd CuSO4 C% thu đc m g kim loại.

a,Xác định m

b,tính C% dung dịch

Giải thích câu ca dao bầu ơi thương lấy bí cùng tuy rằng khác giống nhưng chung một giàn, muốn làm bài văn giải thích trên em cần làm mấy bước đó là bước nào nói rõ cách 1 và 2

Cho hàm số y = ax2

a, Tìm a biết đồ thị hàm số đi qua điểm A(1;3)

b, Tìm a biết đồ thị hàm số cắt đường thẳng y = 2x-2 tại điểm có hoành độ bằng 2

c, Với a tìm được ở câu b, vẽ đồ thị hàm số y = ax2 và y = 2x-2 trên cùng mặt phẳng tọa độ

d, Tìm tọa độ giao điểm của hai đồ thị vừa vẽ ở câu c

Cho hàm số y = (1/3)x2

a, Vẽ đồ thị hàm số trên

A 1927 FIFA commission examined the possibility and on the eve of the following year's Amsterdam Olympics, FIFA's Congress voted __________ (36) an inaugural world championship in 1930. The only remaining question was where. Italy, Netherlands, Spain, Sweden and Uruguay all expressed __________ (37) interest but the Uruguayans alone were prepared to pay all travel and hotel expenses as well as build a new stadium at a time of economic uncertainty. Add the fact Uruguay would be __________ (38) its centenary that same year and FIFA duly plumped for the South Americans, confirming their decision at the 1929 Congress in Barcelona.

Finding the teams to take part __________ (39) the next challenge. Seven signed up from the home continent along with Mexico and the United States. But two months before the start, there was still no European entrant. The prospect of two months away was an obvious deterrent for players with jobs at home but France and Belgium – the only two FIFA founder members to participate – eventually __________ (40) to undertake the long journey together with Yugoslavia and Romania.

Question 36: A. stage B. to stage C. staging D. have staged

Question 37: A. an B. a C. the D. x

Question 38. A. celebrating B. hosting C. defeating D. winning

Question 39. A. is B. be C. was D. will be

Question 40: A. conveyed B. made C. attracted D. agreed

The King of Football" better known as Pele was born in Edson Arantes Do Naselmento on October 23,1940 in Tres Coracoes Brazil. Son of "Dondinho" and Celeste Arantes, Pele's family was very poor. He grew up in poverty making Soccer not only an escape but a mind easier. His Father was a football player (Soccer) that later became Pele's mentor and trainer. Pele's natural talent showed off and at age 15 his career began in Santos. At age 16 he was recruited to play with Brazil's National Team. There just being the very first step in becoming one of the Best players to date. Pele won three FIFA World Cups in 1958 in Sweden, 1962 in Chile, and 1970 in Mexico. He retired in 1977 having 1281 goals and playing 1363 games. He is still known as the best player who has lead Brazil to three consecutive Championships. Also known as a humanitarian voicing his voice about the poverty issues in Brazil. Also encouraging many kids around the world that they can be great and make history no matter where you come from, your race, and who you are.

Question 31: When was Pele born?

A. in 1940 B. in 1962 C. in 1970 D. in 1977

Question 32: Was he born of a well-being family?

A. Yes, he was B. No, he wasn’t

Question 33: Who was Pele’s mentor and trainer?

A. his teacher B. his coach C. his brother D. his father

Question 34: How old was he when he was recruited to play with Brazil's National Team?

A. 13 B. 14 C. 15 D. 16

Question 35 : How many goals had he scored before he retired?

A. 1281 B. 1362 C. 1977 C. 1940

Question 28 : _______ examinations always make him nervous.

A. an B. a C. the D. θ

Question 29 : The children were __________ by Walt Disney films.

A. fascinating B. fascinated C. fascination D. fascinate

Question 30: The baby was ________ of being left alone in the room.

A. terrible B. terrified C. terrific D. terrifying

Question 26 : What ________ wear for tonight’s party?

A. will you B. will you be going to

C. are you D. are you going to

Question 27 : The coach ________ announce the list of footballers at the meeting tomorrow morning. He’s

got the final list.

Question 23 : ______ breakfast is ______ first meal of the day.

A. The/ the B. A/ ø C. The/ ø D. ø/ the

Question 24 : The Beatles used to be internationally famous ______ their songs and performance.

A. for B. along C. with D. a

Question 25 : Don’t let the children see _______ films.

A. horror B. horrifying C. horrified D. horrible

Question 20 : The sports ____________ lasted for 2 weeks in London.

A. compete B. competition C. competing D. competitive

Question 21 : Playing sports is _________ good way to stay away from stress.

A. a B. an C. the D. x

Question 22 : __________ is a running race of over 26 miles.

Câu 2: tìm các giới hạn sau:

C. $\underset{x\to 2}{\lim }\frac{5x-3}{x-2}$

D. $\underset{x\to 1}{lim} \frac{\sqrt{3x+1}-2x}{1-\sqrt{x}}$

Question 17 : The host nation was Uruguay and it __________ Argentina in the final.

A. awarded B. defeated C. achieved D. witnessed

Question 18 : Up to now, the world has witnessed twenty-one World Cup_________.

A. tournaments B. games C. events D. audiences

Question 19 : Annie love doing sports. She’s ___________.

A. hungry B. happy C. funny D. sporty

Question 14 : The _________ game of the 1994 tournament was played to a television audience of more

than 1 million viewers.

A. final B. friendly C. joint D. popular

Question 15 : These are all-star, professional teams __________ of 22 players each.

A. consisted B. composed C. included D. contained

Question 16 : Do you know which country __________ the 2022 World cup?

Question 11: The Red Bull team is considered as __________ finalist of the two teams.

A. the strongest B. stronger C. the stronger D. strongest than

Question 12 : If our team defeat Banana team, we ________ the trophy.

A. will award B. are awarded C. to award D. will be awarded

Question 13 : Where will the World cup 2020___________?

A. be held B. held C. hold D. be hold

Question 8: The team who comes second only to another team in a competition is the ________.

A. runner-up B. world cup C. tournament D. champion

Question 9: My village ___________ part in the sporting event soon.

A. will takes B. is going to take C. taking D. takes

Question 10: This championship attracts millions ___________ participants all over the world.

A. in B. on C. of D. to

Question 5 : A midfielder is a member of a soccer team active in the corner of the playing field,

. often both offensively and defensively

A. a member B. in C. offensively D. defensively

Question 6: A fan is someone who admires and supports a person team sports, etc.

A. a B. someone C. admires D. team sports

Question 7: In football, a small yellow card is shown to a player by the referee as a warning that

the player not obeyed a rule.

9. A: Did you post that letter for me?

B: Oh. I'm sorry. I completely forgot. ............................ it now (I/do)

10. A: The ceiling in this room doesn't look very safe, does it?

7. A: I don't know how to use this camera.

B: It's easy. ............................... you (I/show)

8. A: What would you like to eat?

B: ........................ a sandwich, please? (I/have)

5. A: I've decided to repaint this room.

B: Oh, have you? What colour ....................... it (you/paint)

6. A: Where are you doing?Are you going shopping?

3. A: I've got a headache.

B: Have you? Wait a second and ................... an aspirin for you (I/get)

4. A: Why are you filling that bucket with water?