Hãy tính thể tích của 1 bể nc dạng hình hộp chữ nhật có chiều cao 2m ,kích thước đáy là 2.1m.Hỏi bể đó chứa dc bao nhiêu kích thước

Đề bài: viết 1 đv 10-12 câu nêu suy nghĩ của em về ý kiến sau: Biết nói lời xin lỗi thì không bao giờ là muộn. Đoạn văn sử dụng 1 phép nối để liên kết. 

help mik minh tym choaaa

dg can gapp

1. Không làm phép tính cụ thế giải thích tại sao:
A= 1 111 + 1 096 +99 908 không chia hết cho 2
B=2.51.456 . 7 809 chia hết cho 17

2. Tìm số tưr nhiên n>1 sao cho:
a) n +5 chia hết cho n+ 1
b) 2n + 1 chia hết cho n – 1

mik can gap

s= 13 + 13^1+13^2+...+13^99

rut gon

1. so sánh

a, 2 ^5 và 5^2      b, 2^4 và 4^2    c 3^60 và 5^40 d, 5^20 và 3^40     e, 4^55 và 8^35    g, 5^21 và 25^10

ex11. fill the gaps with the possessive case of nouns , deccide whether you have to use `s or of .
1. the boy has a car . 
1. the boy has a car .
-> it`s the ...........
2 . khanh has an english book.
-> it`s .......
3. the magazine has my photo on its cover
-> my picture is on .......
4. my friends live in this house.
-> its`s .........
5. there is coffee in the cup
-> it`s .......

Ex 3. circle the letter A,B,C or D before the word or phrase of words that best fits the gap in the following sentences.
1.  ________ a table in your room ?
A. are there       B. Is there       c. Have there           d. has there

2.there are a lot of things ______ in Thanh Hoa.
A. see          B. to see      C. seeing         D. to seeing

3. there are many books and things on the floor . It `s really ________
A. clena       b. messy            c. interesting         d. tidy

4. she lives_ her parents in the country house but her sister in a yown house ______ Thanh Hoa
a. with - at      b. at - at       c. of - in    d. with in 

5. they move ____ a new house ___ the city centre.
a. to - in b. at - at    c. to - from . d. from - in 

6. i live in a town house . but my grandparents live in a ______ house/
a villa   b. country  c. apartment     d. city 

7 there are two fans ____ the ceiling/
a. at         b. in       c. on      d. between

8 there is a big photo of his family ______ th wall.
A. on      b. at         c.in           d. next

9 there ________ four chairs and a table _______ the middle of my room.
a. is / on    b. is / in      c. are / at        d. are/ in

10 there are many books_______ the floor.
a. in      b. with    c.on      d. for

ex10. fill the gaps with the possessive case of nouns.
1. that is .......... bedroom. (peter)
2. let`s go to the .......( smiths)
3. the ............ room is upstirs. (children)
4 . .......................sister is twelve years old ( nam ) 
5. ....................and.......... school is old.( susan - steve )
6. .......... books are on the second floor. ( men)
7. her ......... car was not expensive . ( parents ) 
8. .............. pen is new.(charles)
9. this is the ........ bike . ( boy)
10. those are the ......... pencils. ( boys )

ex11. fill the gaps with the possessive case of nouns , deccide whether you have to use `s or of .
1. the boy has a car . 
1. the boy has a car .
-> it`s the ...........
2 . khanh has an english book.
-> it`s .......
3. the magazine has my photo on its cover
-> my picture is on .......
4. my friends live in this house.
-> its`s .........
5. there is coffee in the cup
-> it`s .......                                          mik can gap

mik can gap help di plssssss