rewwrite the sentences 1 i think it may rainit look as......2. do you like learning a foreign language?are you.....3 the...

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...

Dưới đây là một vài câu hỏi có thể liên quan tới câu hỏi mà bạn gửi lên. Có thể trong đó có câu trả lời mà bạn cần!

Nguyễn Khánh Linh

12 tháng 9 2019

B.Thị Anh Thơ

12 tháng 9 2019

đăng sang box anh nha bạn

Lê Hoàng An

2 tháng 9 2019

VLC:

1. I do wishes you would stop bitting your nails, Brian! It really annoys me (nerve)

2. You made an embarrassing mistake when you asked when his wife was (foot)

#Tiếng anh lớp 10

Trần Thị Huyền Ny

9 tháng 12 2021

Fill the words in brackets into correct positions of the sentences:

1. You are talkative. (sometimes)

2. He goes home late last night .(always)

Nguyễn Thị Chanh

9 tháng 12 2021

you are sometimes talkative

he always goes home late at night

Trần Nguyễn Thị Diễm

12 tháng 12 2021

Trắc nghiệm về hóa học lớp 10 bảng tuần hoàn các nguyên tố hóa học

Trần Thị Huyền Ny

9 tháng 12 2021

Fill the words in brackets into correct positions of the sentences.

1. You are talkative. (sometimes)

2. He goes home late last night .(always)

Nguyễn Hiền Linh

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...

lưu thanh nghi

25 tháng 2 2020

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 )

#Tiếng anh lớp 10

王一博

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

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...

Nguyễn Văn A

10 tháng 9 2021

Hoàng Nữ Hồng Khánh

10 tháng 9 2021

I spend 10 minutes to put on her make up

Xác định số oxi hóa của Mn, Cr, Cl, P, S, C, Br :a) Trong phân tử KMnO4, Na2Cr2O7, KClO3, H3PO4b) Trong...

Hoc.24

9 tháng 5 2016

Võ Đông Anh Tuấn

9 tháng 5 2016

a) Trong phân tử:

b) Trong ion: có số oxi hóa là -1.

Cho biết phản ứng thuận nghịch sau: 2NaHCO3(r) Na2CO3(r) + CO2(k) + H2O(k), ∆H > 0Có thể dùng những biện pháp gì để chuyển hóa nhanh và hoàn toàn NaHCO3 thành...

Olm_vn

3 tháng 5 2016

Nguyễn Thị Nguyên

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.

Nguyên tử kẽm có bán kính r = 1,35.10-1 nm và có khối lượng nguyên tử là 65 u.a) Tính khối lượng riêng của nguyên tử kẽm.b) Thực tế hầu như toàn bộ khối lượng nguyên tử tập trung ở hạt nhân với bán kính r = 2.10-6 nm. Tính khối lượng riêng của hạt nhân nguyên tử kẽm.Cho biết...

Nhóc Edo

3 tháng 5 2016

Nguyễn Thị Nguyên

3 tháng 5 2016

Bạn xem mình trả lời nha :

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

1u = 1,6600. 10^-24 g

m_zn = 65 x l,6600.10^-24 g = 107,9.10^-24 g

V_nguyêntửZ_n = $\frac{4}{3}$ .π.r³ = $\frac{4}{3}$ .π.(0,135.10^-7) = 10,3.10^-24 cm³.

D_nguyên_{tử Zn =} $\frac{m}{V}= \frac{107,9.10^{-24}}{10,3.10^{-24}}$ = 10,48g/cm³.

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

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

V _{hạt nhân nguyên tử Zn} = $\frac{4}{3}$ .π.(2.10 ^-¹³)³ = 33,49.10^-39 cm³

D _{hạt nhân nguyên tử Zn} = $\frac{107,9.10^{-24}}{33,49.10^{-39}}$ = 3,22.10¹⁵ g/cm³

= 3,22.10⁹tỉ tấn/cm³

Đinh Nguyễn Gia Khang

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?