At twenty-five past nine, the bell rings and all the students do into the yard. It is time for recess. They are all happy and excited. They meet their friends and have some fun. Many are talking about the last class, or last night's movie. Som are eating and drinking as well as chatting. Some students are playing gameslike blindman's bluff or catch. Some boys are playing marbles and some girls are skipping rope. But the most popular activity is talking. The yard is very noisy until the bell rings. Then everyone goes indoors and classes begin again 

At twenty-five past nine, the bell rings and all the students do into the yard. It is time for recess. They are all happy and excited. They meet their friends and have some fun. Many are talking about the last class, or last night's movie. Som are eating and drinking as well as chatting. Some students are playing gameslike blindman's bluff or catch. Some boys are playing marbles and some girls are skipping rope. But the most popular activity is talking. The yard is very noisy until the bell rings. Then everyone goes indoors and classes begin again. 
Yeserday, my school is very fun. Many students met their friends. It's so cool. I'm played basketbaal. I love it. It's very graet. and I love my school so much. 

Từ 2 đến 1000 có:

( 1000 - 2 ) : 2 + 1 = 500(số chẵn)

Tổng các số đó là:

N = ( 1000 + 2 ) x 500 : 2 = 250500

Số này chia hết cho 4

Khi thay + a thành - a thì N bị giảm đi a x 2 cũng là số chia hết cho 4. Do đó kết quả cuối cùng phải là số chia hết cho 4. Minh tính được 2002, Minh tính được 2006 đều là số không chia hết cho 4. Vậy cả hai bạn đều tính sai

nếu tổ 1 đắp được 3m thì tổ 2 đắp được 3m

nếu tổ 2 đắp được 44m thì tổ 1 cũng đắp được 44m

mà tổ ba dắp dược 8m thì tổ 1 đắp được 4m

vậy tổ 3 đắp gấp đôi tổ 1

vậy tổ 3 đắp:44*2=88(m)

Đáp số:tổ 1 44m

tổ 2:44m

tổ 3:88m

Life in the city is full of activity. Early in the morning hundreds of people rush out of their homes in the manner ants do when their nest is broken. Soon the streets are full of traffic. Shops and offices open, students flock to their schools and the day's work begins. The city now throb with activity, and it is full of noise. Hundreds of sight-seers, tourists and others visit many places of interest in the city while businessmen from various parts of the world arrive to transact business.
Then towards evening, the offices and day schools begin to close. Many of the shops too close. There is now a rush for buses and other means of transport. Everyone seems to be in a hurry to reach home. As a result of this rush, many accidents occur. One who has not been to the city before finds it hard to move about at this time. Soon, however, there is almost no activity in several parts of the city. These parts are usually the business centres.
With the coming of night, another kind of actịvity begins. The streets are now full of colorful lights. The air is cooler and life becomes more leisurely. People now seek entertainment. Many visit the cinemas, parks and clubs, while others remain indoors to watch television or listen to the radio. Some visit friends and relatives and some spend their time reading books and magazines. Those who are interested in politics discuss the latest political developments. At the same time, hundreds of crimes are committed. Thieves and robbers who wait for the coming of night become active, and misfortune descends upon many. For the greed of a few, many are killed, and some live in constant fear. To bring criminals to justice, the officers of the law are always on the move.
Workers and others who seek advancement in their careers attend educational institutions which are open till late in the night. Hundreds of them sit for various examinations every year. The facilities and opportunities that the people in the city have to further their studies and increase their knowledge of human affairs are indeed many. As a result, the people of the city are usually better informed than those of the village, where even a newspaper is sometimes difficult to get.
The city could, therefore, be described as a place of ceaseless activity. Here, the drama of life is enacted every day

Chúc bn học tốt

nếu chuyển 2 quyển từ ngăn trên xuống ngăn dưới thì số sách ngăn dưới nhiều thêm là:

            2+2=4(quyển)

gọi số sách ngăn trên là a

số sách ngăn dưới là b

mà ta có b:a=3

khi chuyển ta có (b+2):(b-2)=4

số sách ban đầu ngăn trên bằng 1/3 ngăn dưới

tổng số sách ko thay đổi

hiệu số sách +4

vậy khoảng cách là :4

mà khoảng cách là 4 quyển nên lúc sau ngăn trên có số sách là:

             4+4=8(quyển)

vậy số sách ban đầu ngăn trên có là:

              8+2=10(quyển)

ngăn dưới là:

              10*3=30(quyển)

                        đáp số: ngăn trên:10 quyển

                                    ngăn dưới:30 quyển

1 Her lips are full->her lips aren't slim

2 The flowersare beautiful->they (đề sai chỗ nào đó nha bn )

3 Where do you live->what is your address?

4 Where does she live-.>what is her address?

5 chưa có đề mik ko giải nha bn

Gọi a là số tuổi của em hiện nay

Khi chị bằng tuổi e hiện nay thì tuổi của chị lúc đó là a 

Vì khi chị bằng tuổi e hiện nay thì tuổi của em lúc đó là \(\frac{3}{5}\)a

Mà ta có số tuổi mà chị hơn em không thay đổi nên ta có phương trình

\(21-a=a-\frac{3}{5}a\)

\(\Leftrightarrow2a-\frac{3}{5}a=21\)

\(\Leftrightarrow\frac{7}{5}a=21\)

\(\Leftrightarrow a=15\)

Vậy hiện nay em 15 tuổi

Đặt CTHH của hợp chất A là P_xO_y ta có:

x : y = \(\frac{43,66}{31}:\frac{56,34}{16}\approx2:5\)

CTHH là P₂O₅ (thỏa mãn dữ kiện đề bài)

Suy ra trong hợp chất A số nguyên tử P là 2

số nguyên tử O là 5

1. What did you do yesterday afternoon?

2. He is riding his bike to school.

3. My dream house will  be a cottage in the countryside. 

4. You should not play with a lighter. 

5. It will be cold and stomy tomorrow.

6.  I often go to my hometown by ferry boat.