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26 tháng 10 2019

Em nhắc lại kiến thức thôi nhé!

A liên kết với T bằng 2 liên kết Hidro

G__________X_____3____________

( bài 16 làm theo quán tính :))

16.

Số liên kết Hidro của A và G là:

2A + 3G = 2480 ( lk)

Theo đề ta có: A - G = 240

hpt: \(\left\{{}\begin{matrix}2A+3G=2480\\A-G=240\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}A=640\left(nu\right)\\G=400\left(nu\right)\end{matrix}\right.\)

Chiều dài của gen là:

\(l=\left(640+400\right).3,4=3536\left(\overset{o}{A}\right)\)

______________________________________

17.

Số liên kết Hidro là:

\(2A+3G=400.2+800.3=3200\left(lk\right)\)

26 tháng 10 2019

Sinh học tế bào

27 tháng 10 2019

I. Nội qui tham gia "Giúp tôi giải toán"

1. Không đưa câu hỏi linh tinh lên diễn đàn, chỉ đưa các bài mà mình không giải được hoặc các câu hỏi hay lên diễn đàn;

2. Không trả lời linh tinh, không phù hợp với nội dung câu hỏi trên diễn đàn.

3. Không "Đúng" vào các câu trả lời linh tinh nhằm gian lận điểm hỏi đáp.

Các bạn vi phạm 3 điều trên sẽ bị giáo viên của Online Math trừ hết điểm hỏi đáp, có thể bị khóa tài khoản hoặc bị cấm vĩnh viễn không đăng nhập vào trang web.

27 tháng 10 2019

"Giúp tôi giải toán" trên Online Math đã trở thành một diễn đàn hết sức sôi động cho các bạn học sinh, các thầy cô giáo và các bậc phụ huynh từ mọi miền đất nước. Ở đây các bạn có thể chia sẻ các bài toán khó, lời giải hay và giúp nhau cùng tiến bộ. Để diễn đàn này ngày càng hữu ích, các bạn lưu ý các thông tin sau đây:

I. Nội qui tham gia "Giúp tôi giải toán"

1. Không đưa câu hỏi linh tinh lên diễn đàn, chỉ đưa các bài mà mình không giải được hoặc các câu hỏi hay lên diễn đàn;

2. Không trả lời linh tinh, không phù hợp với nội dung câu hỏi trên diễn đàn.

3. Không "Đúng" vào các câu trả lời linh tinh nhằm gian lận điểm hỏi đáp.

Các bạn vi phạm 3 điều trên sẽ bị giáo viên của Online Math trừ hết điểm hỏi đáp, có thể bị khóa tài khoản hoặc bị cấm vĩnh viễn không đăng nhập vào trang web.

11 tháng 9 2023

Đáp án: 1. The history of the internet (Lịch sử của Internet)

26 tháng 3 2022

business

19 tháng 5 2016

3 câu cuối của bn ý nghĩa hơi lủng củng

19 tháng 5 2016

The-> the(không cần viết hoa).

Giữa "the internet" và " which" không cần dấu ",".

Giữa "use" và " is" không cần dấu ",".

Chech-> check(sai chính tả).

Work hard-> working hard(Vì ở đây cần danh từ chứ không phải động từ).

Giữa "hard" và " we" cần thêm dấu "," để ngăn cách trạng ngữ và thành phần chính của câu.

Chữ "or" thứ nhất nên thay thành dấu "," vì không nên lặp từ.

Friends and relatives-> relatives (vì relative(n): người thân, bao gồm cả bạn bè).

Trong văn nói, từ xưng hô không nên là "I" mà "we" vì chỉ chung tất cả mọi người.

 

alo alo mn ơi ở đây cần có ng đc cíu cíu cíu vớiiiiVIII - Complete each of the following sentences in such a way that it means the same as the sentence printed above it. 1. “You shouldn’t lend him any more money,” Mrs. Tuyet said to Nga.   Mrs. Tuyet advised __________________________________________________.2. It was so late that nothing could be done. It was too ___________________________________________________________.3. Smoking is not allowed in the library. Would you...
Đọc tiếp

alo alo mn ơi ở đây cần có ng đc cíu cíu cíu vớiiii

VIII - Complete each of the following sentences in such a way that it means the same as the sentence printed above it.

1. “You shouldn’t lend him any more money,” Mrs. Tuyet said to Nga.

   Mrs. Tuyet advised __________________________________________________.

2. It was so late that nothing could be done.

 It was too ___________________________________________________________.

3. Smoking is not allowed in the library.

 Would you _________________________________________________________?

4. Why did you phone him, Linh?

 I want to know what __________________________________________________, Linh.

5. It is not necessary for you to ring me unless you’ve got a problem. 

 I __________________________________________________________________

6. He failed the exam because of his laziness.

 Because he___________________________________________________________.

7. I’ll telephone you tomorrow morning.

 I’ll give______________________________________________________________.

8. Walking in the rain gives my brother pleasure.

 My brother enjoys_____________________________________________________

9. Have you ever played a computer game before?

 Is this_______________________________________________________________?

10. I can’t stand people interrupting me when I’m studying

 I would rather ________________________________________________________

11. Although his leg was broken, he managed to get out of the car.

 Despite ________________________________________________________.

12. Tan likes going on holiday with his family, but he prefers camping with friends.

 Tan doesn’t_____________________________________________________.

13. A true story forms the basis of Mary’s new novel.

 Mary’s new novel is______________________________________________.

14. The cost of living has fallen considerably in the past week.

 There has ______________________________________________________.

15. “I’m sorry I didn’t catch the ball for your sister.” Nam said to Huong

 Nam apologized  ________________________________________________.

1
7 tháng 12 2021

1. “You shouldn’t lend him any more money,” Mrs. Tuyet said to Nga.

   Mrs. Tuyet advised ____Nga not to lend him any more money ______________________________________________.

2. It was so late that nothing could be done.

 It was too _____late for something to be done______________________________________________________.

3. Smoking is not allowed in the library.

 Would you ___mind not smoking in the library______________________________________________________?

4. Why did you phone him, Linh?

 I want to know what _____did you phone him for _____________________________________________, Linh.

5. It is not necessary for you to ring me unless you’ve got a problem. 

 You don't have to ring me unless you’ve got a problem.  ________________________________________________________________

6. He failed the exam because of his laziness.

 Because he_____was lazy, he failed the exam______________________________________________________.

7. I’ll telephone you tomorrow morning.

 I’ll give___you a call tomorrow morning. ___________________________________________________________.

8. Walking in the rain gives my brother pleasure.

 My brother enjoys______walking in the rain_______________________________________________

9. Have you ever played a computer game before?

 Is this____the first time you have ever played a computer game ___________________________________________________________?

10. I can’t stand people interrupting me when I’m studying

 I would rather ___people didn't interrupt me when I am studying_____________________________________________________

11. Although his leg was broken, he managed to get out of the car.

 Despite his broken leg, he managed to get out of the car. ________________________________________________________.

12. Tan likes going on holiday with his family, but he prefers camping with friends.

 Tan doesn’t____ like going on holiday with his family so much as camping with friends

_________________________________________________.

13. A true story forms the basis of Mary’s new novel.

 Mary’s new novel is___ based on a true story.

___________________________________________.

14. The cost of living has fallen considerably in the past week.

 There has _____been a considerable fall in the cost of living in the past week._________________________________________________.

15. “I’m sorry I didn’t catch the ball for your sister.” Nam said to Huong

 Nam apologized  __Nam apologized Huong for not having caught the ball for her sister.______________________________________________.

30 tháng 11 2021

Refer:

1.Work from home, collaboration, and access to a global workforce. The Internet offers people benefit to connect with others around the world. There are various online services that help you to communicate and work with other people all over the world. Also, it can make services and producing new products faster.

2.I think the Internet is a very fast and convenient way for our to get information. It is very useful because it help us for many purpose, exam:education, communication,entertainment and commerce,...
Nowaday, people use more the Internet because the Internet as a
source of information such as news, articles, weather forecast,... and
as a means of education as online lesson, online school, self study,...
and as a source of entertainment such as music, movies, game,...It helps
people can do online commerce, we can communicate with friends and
relatives by means of e-mail or chatting. However, next to the benefits,
the Internet is still many limit such as: can not easily get access to it,
onlytime coming and costly but also dangerous because of virus and bad
program, Internet user sometimes have to suffer various richs such as spam
or electronic junk mail, and personal information leaking.

23 tháng 12 2020

The internet is often described as a network of netwooks ..because.. all the smaller networks of organizations are linked together into one giant network ..called.. the internet . All computers are pretty much equal once connected to the internet , the ..only. difference will be the speed of the connection ..which. is dependent on your internet service provider and your own modem ..There. are many things you can do and participate in once connected to the internet . They include using a range of services to communicate and share information and things quickly and inexpensively ..with tens of. millions of people ,.both.. young and from diverse cultures around the world 

3 tháng 12 2021

1 invention

2 journalism

3 communication

4 Interactive

5 latest

18 tháng 12 2022

What’s your favorite type of media? Why?
- My favorite type of media is i like reading novels with themes about Vietnamese history because they can help me understand all the stories of heroes who died about the country and help me understand life during the war.
Tell some advantages and disadvantages of the Internet.
+The advantage of the Internet is that it helps us find information in the fastest way and entertain after stressful studying hours.
+The downside of the Internet is that it can make children addicted and harm their health.

What do you use the Internet for? - Why do people use the Internet? 

-I use the Internet to be able to contact my distant relatives and find solutions to difficult exercises.

-People use the Internet because the Internet is a storehouse of knowledge for everything and for entertainment after school and tired work.

 



 

18 tháng 12 2022

bỏ chữ i like giúp em nhé em ghi nhầm