(-41)+(-33)=?
what là ............
when là .........
they là ........
their là ..........
what là "Cái gì"
when là "Khi"
they là "Họ"
their là "Của họ"
what:cái gì
when:khi nào
they:họ
their:của họ
Bước tới bàn cô nổi da gà
Mặt mày xanh ngắt mắt hoa hoa
Lơ ngơ dưới lớp tìm bạn giúp
Lác đác bên cô trộm mắt nhìn
Nhớ lúc ở nhà không chịu học
Bây giờ mỏi miệng cứ van xin
Lạnh lùng cô viết nguyên con bốn
Cuối tuần xác định nghe cải lương
bài này đc lấy từ bài nào?
Theo t nhớ về kiến thức lớp 7 của t thì có lẽ bà inafy lấy cảm hứng từ bài '' Qua Đèo Ngang '' của Bà Huyện Thanh Quan
Nhảy qua Đèo Ngang bỗng mốt đà
Đập đầu vào đá máu tuôn ra
Lom khom dưới núi tìm y tá
Y tá theo trai không có nhà
Đau đầu chảy máu em sắp chết
Nhìn đi nhìn lại chẳng thấy ai
Khắc lên bia mộ bản thông báo
Nhảy qua Đèo Ngang nhớ lấy đà
Quan sát các mẫu vật xác định vị trí gọi tên các cơ quan của cây và hoàn thành bảng sau
Tên cây?
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-
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Cơ quan quan sát được?
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-
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Mô tả?
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mẫu vật xách định là cái nào
< III >: Make the correct choice :
1. You can hear BBC news ______ all over the world.
a. shows B. announcements C. receipts D. programs
2. Television can make things _____ because it presents information is an effective way.
a. memory B. memorial C. memorable D. memorably
3. Do you understand this _____? ‘200 WOMEN GIVEN WRONG DIAGNOSIS’
a. report B. headline C. news D. advert
4. Children often prefer looking at _____ to reading books.
a. newspapers B. comics C. articles D. commercials
5. In Britain, there are some ‘terrestrial’ _____ on TV such as BBC1, BBC2, ITV1,...
a. programs B. series C. channels D. cables
6. ‘Is the paper published every day ?’ ‘No, it _____ out once a week.’
a. turns B. goes C. produces D. comes
7. Editorial _____ in ‘The Guardian’ tended to support the government in this matter.
a. comments B. complaints C. commands D. comedies
8. A _____ is a film with factual information, often about a problem in society.
a. series B. soap opera C. documentary D. drama
9. There was a report _____ The Independent _____ this new law.
a. on/ for B. in/ to C. in/ about D. on/ in
10. _____ is a system connecting millions of computer worldwide.
a. The television B. The Internet C. The media D. The phone
11. The scheme allows students from many countries _____ with each other.
a. communicate B. to communicate C. communicating D. communicates
12. _____ the storm warnings, we did not go out last night.
a. Since B. In spite of C. Because of D. The result
13. This is the fifth time you _____ me the same question.
a. ask B. asked C. are asking D. have asked
14. When I arrived at the party, Lucy _____ home.
a. has already gone b. had already gone C. already went D. already was going
15. English people spent 18 hours per week _____ TV.
a. watching B. to watch C. watch D. for watching
16. I’ve lived in a small house near the coast _____ 1990.
a. from B. since C. in D. for
17. She left home in 1993 and _____ since.
a. hasn’t seen B. didn’t see C. hasn’t been seen D. wasn’t seen
18. It’s time we _____ this old car and bought a new one.
a. will sell B. have sold C. had sold D. sold
19. Since Mr. Hassan _____ president, both taxes and unemployment _____.
a. has become/ increased B. became/ increased
c. became/ have increased D. has become have increased
20. _____ all my warnings, he tried to fix the computer himself.
a. Although B. In spite of C. Because D. Instead of
21. Some television programs _____.
a. may make children to be violent. B. make children be violent.
c. may make children violent. D. make children being violent.
22. I _____ away most of my old books when I moved house.
a. threw B. have thrown C. had thrown D. was throwing
23. You _____ whisper. Nobody can hear us.
a. needn’t to B. don’t have to C. mustn’t D. need to
24. The children _____ to the Botanical Garden.
a. were enjoyed taken b. were enjoyed taking C. enjoyed taking D. enjoyed being taken
25. So far this week there _____ three burglaries in our street.
a. are B. were C. have been D. had been
< III >: Make the correct choice :
1. You can hear BBC news ______ all over the world.
a. shows B. announcements C. receipts D. programs
2. Television can make things _____ because it presents information is an effective way.
a. memory B. memorial C. memorable D. memorably
3. Do you understand this _____? ‘200 WOMEN GIVEN WRONG DIAGNOSIS’
a. report B. headline C. news D. advert
4. Children often prefer looking at _____ to reading books.
a. newspapers B. comics C. articles D. commercials
5. In Britain, there are some ‘terrestrial’ _____ on TV such as BBC1, BBC2, ITV1,...
a. programs B. series C. channels D. cables
6. ‘Is the paper published every day ?’ ‘No, it _____ out once a week.’
a. turns B. goes C. produces D. comes
7. Editorial _____ in ‘The Guardian’ tended to support the government in this matter.
a. comments B. complaints C. commands D. comedies
8. A _____ is a film with factual information, often about a problem in society.
a. series B. soap opera C. documentary D. drama
9. There was a report _____ The Independent _____ this new law.
a. on/ for B. in/ to C. in/ about D. on/ in
10. _____ is a system connecting millions of computer worldwide.
a. The television B. The Internet C. The media D. The phone
11. The scheme allows students from many countries _____ with each other.
a. communicate B. to communicate C. communicating D. communicates
12. _____ the storm warnings, we did not go out last night.
a. Since B. In spite of C. Because of D. The result
13. This is the fifth time you _____ me the same question.
a. ask B. asked C. are asking D. have asked
14. When I arrived at the party, Lucy _____ home.
a. has already gone b. had already gone C. already went D. already was going
15. English people spent 18 hours per week _____ TV.
a. watching B. to watch C. watch D. for watching
16. I’ve lived in a small house near the coast _____ 1990.
a. from B. since C. in D. for
17. She left home in 1993 and _____ since.
a. hasn’t seen B. didn’t see C. hasn’t been seen D. wasn’t seen
18. It’s time we _____ this old car and bought a new one.
a. will sell B. have sold C. had sold D. sold
19. Since Mr. Hassan _____ president, both taxes and unemployment _____.
a. has become/ increased B. became/ increased
c. became/ have increased D. has become have increased
20. _____ all my warnings, he tried to fix the computer himself.
a. Although B. In spite of C. Because D. Instead of
21. Some television programs _____.
a. may make children to be violent. B. make children be violent.
c. may make children violent. D. make children being violent.
22. I _____ away most of my old books when I moved house.
a. threw B. have thrown C. had thrown D. was throwing
23. You _____ whisper. Nobody can hear us.
a. needn’t to B. don’t have to C. mustn’t D. need to
24. The children _____ to the Botanical Garden.
a. were enjoyed taken b. were enjoyed taking C. enjoyed taking D. enjoyed being taken
25. So far this week there _____ three burglaries in our street.
a. are B. were C. have been D. had been
trong bài thơ đoàn thuyền đánh cá nhà thơ huy cận có viêt
" biển cho ta cá như lòng mẹ
nuôi lớn đời ta tự buổi nào "
hai câu thơ trên gợi cho e suy nghĩ gì về thình yêu và ý thức bảo vệ chủ quyền biển đảo của tuổi trẻ Việt Nam nay?
Fall,read, go, take, see, meet, leave, get, pick up
1. I .... my friends . We ... each othet 5 times a day at school
2. my dad .. his office every night at 6:00
he ... on a bus to go home
3.shawn always ... a shower before he ... to sleep
4.flora ... a book and... in bed for a while
5. I saw some leves ... in spetember
Fall,read, go, take, see, meet, leave, get, pick up
1. I see my friends . We meet each othet 5 times a day at school
2. my dad leaves his office every night at 6:00 he gets on a bus to go home
3. shawn always takes a shower before he goes to sleep
4. flora picks up a book and reads in bed for a while
5. I saw some leves fall in spetember
Fall,read, go, take, see, meet, leave, get, pick up
1. I .see... my friends . We ..meet. each other 5 times a day at school
2. my dad... leaves.. his office every night at 6:00
he .picks up.. a bus to go home
3.shawn always ..takes. a shower before he .goes.. to sleep
4.flora ..read. a book and... in bed for a while
5. I saw some leaves fall... in spetember
Cho các sơ đồ phản ứng sau :
a. P + O 2 -------> P 2 O 5
b. Na 2 CO 3 + Ca(OH) 2 -------> CaCO 3 + NaOH
Hãy lập phương trình hóa học và cho biết tỉ lệ số nguyên tử, số phân tử của các chất trong mỗi phản ứng trên.
Xà phòng hóa hoàn toàn 22,2 gam hỗn hợp hai este đơn chức, no, mạch hở là đồng phân của nhau cần dùng 300 ml NaOH 1M. Công thức cấu tạo của hai este là:
A. CH3COOC2H5 và C2H5COOCH3.
B. HCOOC2H5 và CH3COOCH3.
C. CH3COOC2H3 và C2H3COOCH3.
D. C2H5COOC2H5 và CH3COOC3H7.
Ta có công thức dạng chung của este cần tìm là: \(RCOOR'\)hay \(C_nH_{2n}O_2\) \(\left(n\ge2\right)\)
Theo đề là este no đơn chức mạch hở nên khi tác dụng với NaOH có tỉ lệ số mol sẽ là 1: 1
PTHH có được \(RCOOR'\left(0,3\right)+NaOH\left(0,3\right)\rightarrow RCOONa+R'OH\)
nNaOH = 0,3 (mol)
=> nRCOOR' = 0,3 (mol)
=> \(M_{RCOOR'}=\dfrac{22,2}{0,3}=74\left(\dfrac{g}{mol}\right)\)
\(\Leftrightarrow C_nH_{2n}O_2=74\)
\(\Leftrightarrow n=3\)
Vậy công thức phân tử của este no đơn chức cần tìm sẽ là \(C_3H_6O_2\)
\(\Rightarrow Chon\)\(\text{B. HCOOC2H5 và CH3COOCH3. }\)
Tạo chương trình điều khiển chú mèo theo các hoạt động sau
+ Di chuyển 10 bước,
+ Quay 60 độ
+ Thay đổi hình dạng
+ Nói ” Hello”