1. There is a big library in Lam's school

=> Lan's school has a big library.

2. The school library has over five thousand books.

=> There are over five thousand books in the school library.

3. I like Math more than any subject.

=> Math is my favorite subject.

a) CTHH: CaO

PTK: 40+16=56 (đvC)

b) CTHH: NH₃

PTK: 14+3.1=14+3=17 (đvC)

c) CTHH: CuSO₄

PTK: 64+32+16.4=64+32+64= 160 (đvC)

O-------------------A----------------------B--------------------------------x ở dưới 

trên tia Ox có điểm A,B sao cho OA<OB(2cm<4cm)nên điểm A nằm giữa O và B(1)

suy ra : OA+AB=OB

suy ra : AB=OB-OA

                 = 4-2=2(cm)

vậy OA = AB (=2cm)(2)

từ (1) và (2) suy ra A là trung điểm của OB

tick cho mình nhé cảm ơn bạn nhiều
    

Kết hợp các câu sau bằng cách dùng đại từ quan hệ thích hợp:

1.His father was taken into hospital.His health hadn't been good recently.

=> His father was taken into hospital whose heath hadn't been good recently.

2.The raincoat is mine.It is red.

-> The raincoat which red is mine.

3.THe teacher lives near my house.He taught me English last year.

=> The teacher who taught me English last year , lives near my house.

4.The girl tells her mother about the story.She read it last night.

=> The girls tells her mother about the story which she read last night.

5.My sister will leave here tomorrow.Her name is Alison.

=> My sister whose name is Alison will leave here tomorrow.

6.This is Mr.David.He wants to meet you.

=> This is Mr.David who wants to meet you.

7.The museum wasn't open on Sundays.You wanted to visit it.

=> The museum which you wanted to visit, wasn't open on Sundays.

8.I always remember the day.We first came here on that day.

=> I always remember the day that we first came here on.

9.The novel is about two young lovers.Their romance ended happily.

=> The novel is about two young lovers whose romance ended happily.

10.The earth is the third planet from the sun.It is the fifth largest planet in the solar system.

=> The earth which is the fifth largest planet in the solar system, is the third planet from the sun.

II. Viết lại câu với từ cho trước:

1. Nam's ruler is longer than Ba's. (LONG)

=> Ba's ruler s not as long as Nam's

2. Nga started to keep this dog four years ago. (FOR)

=>Nga has started to keep this dog for four years

3. My room and my sister's are not the same. (DIFFERENT)

=>My room and my Sister's are different from the others

4. These roads were small and dark two years ago but they are clean and broad now. (AS.....AS)

=>These roads two years ago were not as clan and broad á now

5. The last time I met her was last Christmas. (SINCE)

=>I haven't met her since last Christmas

6. Lan is taller than Tan. (TALL)

=>Tan is not as tall as Lan

7. Tan's salary is as high as Nhan's. (SAME..............AS)

=>Tan's salary is the same height as Nhan's

People can tell who they are from that they were

My sister is known as the most beautiful girl in her class

I can't see that far

= It is too far for me to see

1, What kind of food would you like for lunch?

2, Vegetables often have dirt on them from the farm