viết một bài văn cảm nhận về bài thơ mẹ vắng nhà nhà ngày bão của tác giả ĐẶNG HIỂN 

giúp em vs ak e cần gấp ak

Cho biết 1 nguyên tử có 12e, 12p, 12n tính khối lượng nguyên tử

 Cho biết 1 nguyên tử có 15e; 15p;16n tính khối lượng nguyên tử

 Cho biết 1 nguyên tử có 8e;8p;8n tính khối lượng nguyên tử  

giúp e vs ak mai e phải nạp r ak e cảm ơn trước ak

e=15; p=15;n=16 

e=8 ;p=8 ;n=8

giúp e vs ak mai e đi học r ak

viết về sở thích đọc truyện bằng tiếng anh lưu ý là đọc truyện nha mn giúp e vs ak

I. Qúa khứ đơn
46. I was in a hurry, so I ( not have)........ time to phone you
47. I(go)....... tothe cinema last wekend.
48. I (see)....... her last year.
49. Hoa (meet) ........ Lan two year ago.
50. She (play) ........ the piano last night.
51. ........ you (watch) .......... TV last night?
52. The house (build) .......... five years ago
53. Last night, I (go) ........... to bed late. Suddenly I (hear) ......... a noise.
I (get) ................ to see what it (be) ............. but I (not see) ............ anything.
54. All the students in our school (receive).......new books yesterday
55. Last night I (watch)......... the movie Romeo and Juliet.
56. He (be)........very surprised when he (look)........ at himself in the mirror yesterday.
57. We(have)....... a great time in England together last year
58. We really (enjoy)................ourselves last Sunday.
59. We (be)......late for school because of the heavy rain last Monday.
14. What you (do) .......  yesterday ? You  (watch) .......... TV last night?
15. She (be)..........born in 1890

I. Put the verbs in brackets in the past simple. Thì quá khứ đơn 
 1.I (meet).......her at the cinema last week.
2. you (see)..... the doctor yesterday? 
3. It (rain)Aamed.. a lot last Sunday. 
4. They (work) .ned.very hard when they (be),...young.
5. Where You (spend)...pen.....your summer holiday last year?
6. Two year ago,she (teach)...........at a village school.
7 What You (do)...dedich.yesterday morning?
8. Mozart (play) play...the piano when he (be)........... three.
9. My father (not watch).... .TV last night. He (read) ..newwspapers.
10. Basketball (become) very popular all around the world in 1990s.
 11. Nam and his classmates (play)..........soccer yesterday afternoon.
12. He (send)...a letter to his penpal last week.
13. Mrs.Hong (teach)... .......us English last year.
 14. Hoa (wear)... .a very beautiful dress last night.
15. Lan (write) ..to her grandparents more often last year. 
 16. His father (work) orhed.....in the garden last Sunday?
17. The weather (be)........ nice yesterday? 
18. He (not have)......... a pizza for lunch yesterday.
19. What you (do)......last night? 
20. They (paint)..........their house yellow last week.