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9 tháng 12 2021

you are sometimes talkative

he always goes home late at night

12 tháng 12 2021
Trắc nghiệm về hóa học lớp 10 bảng tuần hoàn các nguyên tố hóa học
9 tháng 12 2021

1. Sometimes, you are talkative. Hoặc You are sometimes talkative
2. He always goes home lat.

31. Everybody was surprised at his ________________________                    ( survive )32.  She gave me a smile of _____________________                              ( recognize )33.  The __________________ team will parade through the city tomorrow morning.      ( victory )34.   Lost in _________________ , Lan didn't realize she had walked past her house.      ( think )35.   Mothers are often the ones who provide ___________ support for the family.        ( emotion )36.   He was extremely...
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31. Everybody was surprised at his ________________________                    ( survive )

32.  She gave me a smile of _____________________                              ( recognize )

33.  The __________________ team will parade through the city tomorrow morning.      ( victory )

34.   Lost in _________________ , Lan didn't realize she had walked past her house.      ( think )

35.   Mothers are often the ones who provide ___________ support for the family.        ( emotion )

36.   He was extremely ________________________ about the report.                  ( anger )

37.   Readers should use their ____________________when reading this novel.           ( imagine )

38.   He gained __________ experience while working on the project.                   ( value )

39.   Development of the area would ___________ ___the wildlife.                      ( danger )

40.   The _________ _____gives you a general idea of what the book is about.             ( introduce )

The museum is _______________in the center of the city.      ( locate )

32.  He has two _______________, British and Vietnamese.        ( nation )

33.  The workers of the factory are in hospital now because of the ___________ food they ate.   ( contaminate )

34.  India has a ____________ of more than one billion.         ( populate )

35.  Sugar is the _____________ of healthy teeth.              ( destroy )

36.  There's a large ____________ of fruit in the South of our country.          ( vary )

37.  Levels of some pollutants in the air and water are _____________ high.     ( worry )

38.  To ___________ electricity, we are cutting down our central heating.       ( conservation )

39.  Because of her ___________, she was absent from class for a few days.     ( sick )

40.  He has made a _____________ contribution to the company's success.      ( value )

1
25 tháng 2 2020

31. Everybody was surprised at his ________________________                    ( survive ) SURVIVAL 

32.  She gave me a smile of _____________________                              ( recognize ) RECOGNIZATION

33.  The __________________ team will parade through the city tomorrow morning.      ( victory ) VICTORIOUS

34.   Lost in _________________ , Lan didn't realize she had walked past her house.      ( think ) THINKING

9 tháng 5 2016

a) Trong phân tử: 

b) Trong ion:  có số oxi hóa là -1.

     Rewrite using “spend / take” 11. It takes Jill 10 minutes to put on her makeup.…………………………………………………………………………………………..12.  It took us three days to repair his car.…………………………………………………………………………………………..13. I will spend two weeks reading the new book. …………………………………………………………………………………………..14. A...
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     Rewrite using “spend / take”

 

11. It takes Jill 10 minutes to put on her makeup.

…………………………………………………………………………………………..

12.  It took us three days to repair his car.

…………………………………………………………………………………………..

13. I will spend two weeks reading the new book.

…………………………………………………………………………………………..

14. A good chef spent an hour cooking this meal.

…………………………………………………………………………………………..

15. The flight to New York lasted six hours.

…………………………………………………………………………………………..

      Answer the following questions

16. How often do you go to the gym? (sometimes)

…………………………………………………………………………………………..

17. How often does the boy study in the library? (rarely)

…………………………………………………………………………………………..

18. How often did you get presents when you were a child? (frequently)

…………………………………………………………………………………………..

19. How often were you absent from your previous job? (never)

…………………………………………………………………………………………..

20. How often does she go to the dentist? (every month)

…………………………………………………………………………………………..

 

1
10 tháng 9 2021

I spend 10 minutes to put on her make up

3 tháng 5 2016

Bạn xem câu trả lời của mình nha .

Những biện pháp để chuyển hóa nhanh và hoàn toàn NaHCO3 thành Na2CO3: Đun nóng, hút ra ngoài CO2, H2O.  

 
Ex 3 Multiple choice questions 1 I know that he .....................in the library at this moment A works B has worked C is working D was working 2 She .....................sixteen years old next Saturday A is B is going to C will be D has 3 I .............our teacher tomorrow , so I shall give him your note . A have seen B going to see C shall have seen D am seeing 4 I think they 're going to visit SaPa ,...........................? A aren't they B are the going C do I D don't...
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Ex 3 Multiple choice questions

1 I know that he .....................in the library at this moment

A works B has worked C is working D was working

2 She .....................sixteen years old next Saturday

A is B is going to C will be D has

3 I .............our teacher tomorrow , so I shall give him your note .

A have seen B going to see C shall have seen D am seeing

4 I think they 're going to visit SaPa ,...........................?

A aren't they B are the going C do I D don't I

5 Our class ..............a picnic at Thay Pagoda this Sunday .

A am having B will has C is going to have D go to have

6 Where is your father ? He .................in his office

A works B has worked C is working D worked

7 My students .....................hard working

A does not B isn't C aren't D don't

8 He....................a new haircut today

A have B has C haves D to have

9 I usually .....................breakfast at 7.00

A have B has C haves D to have

10 .........................she .......................in a house ?

A do .......be B does ..............be C are D is

1
12 tháng 9 2019

đăng sang box anh nha bạn

3 tháng 5 2016

Bạn xem mình trả lời nha :

a) rzn = l,35.10-1 nm = 0,135.10-7 cm (lnm = 10-9 m)

1u = 1,6600. 10-24 g

mzn = 65 x l,6600.10-24 g = 107,9.10-24 g

VnguyêntửZn = .π.r3 = .π.(0,135.10-7) = 10,3.10-24 cm3.

Dnguyên tử Zn =  = 10,48g/cm3.

b) mhạtnhânZn = 65u  => 107,9 x 10-24 gam

rhạtnhânZn = 2.10-6 nm = (2.10-6 x 10-7)cm = 2.10 -13cm

hạt nhân nguyên tử Zn =  .π.(2.10 -13) 3 = 33,49.10-39 cm3        

hạt nhân nguyên tử Zn =  = 3,22.1015 g/cm3   

                            = 3,22.109tỉ tấn/cm3   

29 tháng 7 2018

Cho mình hỏi trong một số bài ngta dùng khối lượng mol chia cho thể tích cũng ra khối lượng riêng. nhưng sao trong bài này ta không thể suy :m=65u - M=65 g/mol rồi dùng M chia cho thể tích vậy ạ?

3 tháng 5 2016

bạn xem câu trả lời của mình nha :

Điêu sẽ xảy ra nếu:

a) Tăng dung tích của bình phản ứng lên: Cân bằng dịch chuyển theo chiều thuận.

b) Thêm CaCO3 vào bình phản ứng: Chất rắn không ảnh hưởng đến dịch chuyển cân bằng.

c) Lấy bớt CaO khỏi bình phản ứng: Chất rắn không ảnh hưởng đến dịch chuyển cân bằng.

d) Thêm ít giọt NaOH vào bình phản ứng: Cân bằng chuyển dịch theo chiều thuân.

e) Tăng nhiệt độ: Cân bằng chuyển dịch theo chiều thuận.