Ta có: \(\dfrac{U_1}{U_2}=\dfrac{N_1}{N_2}\Leftrightarrow\dfrac{210}{U_2}=\dfrac{2400}{800}\)

\(\Rightarrow U_2=\dfrac{210.800}{2400}=70\left(V\right)\)

tổng số phần bằng nhau là :

4+5=9(phần)

số thóc chứa trong kho thứ nhất là:

1360

\(\lambda=\dfrac{v}{f}=\dfrac{120}{20}=6\left(cm\right)\)

\(\Leftrightarrow\dfrac{S_1S_2}{\lambda}< k< \dfrac{S_1S_2}{\lambda}\)

\(\Leftrightarrow-3< k< 3\)

\(\Leftrightarrow k=\left\{-2;1;0;1;2\right\}\)

\(\Rightarrow\) Có 4 gợn sóng ( vì đường đại cực ứng với trung trực là dduownff thẳng )

Vậy có 4 gợn sóng

bài 39, 2 hạt nhân nhẹ tổng hợp lại thành 1 hạt , A nhỏ hơn 10

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The Manager
745 Le Loi Rd
Sunflower Hotel Da Nang
610 Bach Dang Rd, Da Nang

20 March 2018

Dear Sir or Madam,

I am writing in response to your advertisement on Viet Nam Net for a young and enthusias receptionist.

Last summer, I worked as a receptionist in International hotel for 2 months. My responsibilities included greeting guests, giving them information and help them check in. I also took part in answering the phone as well as their questions.

I consider myself to be young, hardworking,enthusias and helpful. I can speak English quite good and can work as an interpreter. In addition, I can work for long hours, If required.

I can provide references from the hotel’s human resources department.

It would be grateful if I could visit your hotel and discuss my application with you in person. I am available for an interview on any day from Monday to Thursday.

If my application is accepted, I will be able to start work from 15th of May. I am enclosing my CV with this letter.

I look forward to hearing from you soon.

Yours faithfully,
Ichika

FROM: Hoai Giang

TO: The manager of Sunflower hotel

ADRESS: Number 310 Bach Dang St, Da Nang city

Dear sir,

I'm currently writing this letter in order to respond to your advertisement about inviting a receptionist for the sunflower hotel at Da Nang. I am pleased to have the job and serve as a receptionist. 

I've worked as a receptionist for 4 hotels 2 years before. My responsibilities in all the hotels include introducing to passengers, writing the information list ( including phone numbers, customer names and rooms ) and answering the phone. My salary wasn't high after it was overdue, but I shall be grateful to help. 

I've been learning English for over 10 years, so my abiliy is to speak English fluetly, please don't worry. I always consider myself to be hardworking, reliable and energe.

It is my pleasure to serve in this luxurious hotel. If my application is accepted, I will agree and try my best to work as a receptionist in this Sunflower hotel. I shall look forward and wait for your agreement. Please contact me if necessary, with my phone number **********

Your responder

Giang

Duong Hoai Giang.

It's believed that cultural identity helps us identify ourselves as part of a culture.

This can be shown through the language we use to communicate, the food we often eat, the national clothes we wear on special occasions or festivals and cultural praces.

Among these, I think food and culinary traditions are the most important cultural identifiers.

On an individual level, there is a connection between food and each person's family ties.

We grow up eating the food cooked by our mother or other members in our family, so food becomes closely connected to our family traditions.

Many of us associate food from our childhood with warm feelings and good memories and it reminds us of our families and holds a special and personal value for us.

Food from our family often becomes the comfort food we seek when we miss our family or feel stressed.

I still remember a memorable moment when I was a kid.

I could not eat rice because I had a toothache.

My mother cooked soup and brought it to bed for me.

The flavor of the soup became something very familiar to me.

Now, whenever I feel tired or stressed, I remember the soup my mom used to make for me and I crave that soup.

On a larger scale, food is an important part of national culture.

It helps tell where each of us is from.

Each country has its own national cuisine.

For example, Chinese food mainly has sweet and spicy flavor with a special focus on red color decoration.

Traditional cuisine is passed down from one generation to the next and acts as a prominent expression of cultural identity.

Immigrants bring the food of their countries with them wherever they go and cooking traditional food is a way of preserving their culture when they move to new places.

In conclusion, food connects people to their family and nation, so it is a good reflection of a person's culture identity.

Some people believe cultural identity is how we identify ourselves as part of a culture.This can simply be done through the language we use, the food we often have, or the clothing we often wear on special occasions. In my opinion, festivals and cultural praces celebrated and preserved years after years are the most important cultural identifiers.

Through festivals, we want to express our unity as well as cultural identifier. Originally, festivals are special occasions when people at a parular place stop working in order to celebrate parties or events. They are often connected with religious beliefs of a specific group of people to thank God sand ancestors for good harvests, fortune, and happiness.

Along with festivals, cultural praces are unique ways of expressing who we are and what country or culture we belong to. These are traditionally considered the right things to do in a community. For example, Vietnamese people usually go to pagodas on first days of New Year to pray for good health and happiness. Although we are now in modern time, these traditions are well preserved respectably as a cultural stereotype.

As people all over the world become closer and closer, we share our festivals and cultural praces -    the most important features. We organise international festivals and take part in various kinds of cultural events in other countries. This is always the meaningful way of identifying, sharing and preserving cultures.

Name: ( Write your name )

Address: ( your address )

Mobile: ( write you mobilephone )

Email: ( write your email )

Personal summary and career objectives

I am a responsible individual who can work hard, communicates well, and has excellent interpersonal skills. I have recently completed upper secondary education and received the National Certificate of Secondary Education. I am seeking a starting position as a barista so that obtain real-world experience and learn new skills.

Education and qualifications

2019-2021: Dich Vong Upper Secondary School

2015 -2019: Dich Vong Lower Secondary School

2010 - 2015: Dich Vong Primary School

Work experience

Summer, 2020: Waiter at a student canteen

Responsibilities

Greeting customers and arranging seats for them

Taking orders from customers and serving them snacks and drinks

Skills

Good communication and interpersonal skills

Interests

Reading books about making drinks

Learning foreign languages

References

Available upon request

TL

Hi , my name is .... and i would to apply for a position in the city zoo . When I was little, I always dreamed of working in a zoo and i think this a great opportunity to apply for this job .I love animal and have many years of experience in taking care of animal so i think this will be easy to do this job

HT

Intelligent Robots play a vital role in modern days. Besides benefits, we must consider disadvantages when using them.

First, look at the most positive points. Thanks to robots and A.I technology, the number of workforce can be reduced but the production even increases more, especially in the manufacturing industry. The robots can perform the tasks faster than the humans and much more consistently and accurately. They can work at places 24/7 without any salary and food. Additionally, they don’t get bored. In medicine, they helps doctors to diagnose diseases, do the surgeries, especially tiny surgeries with highest accuracy. In some hospitals, the robo pets can help the patients with depression and they keep them active.

On the contrary, robots bring about some troubles. First and for most, training is needed to operate the system, so we need to pay for scientists and trainees, maintenance and reparation expenditure, which raise the cost overall. Another point I’d to mention is the machine malfunction, which creates lots of troubles and confusions, and even sometimes lead to unexpected accidents. It’s reported that a robot in a car manufacturing factory killed a worker. This results in a worrisome of people using A.I for medical purposes. Furthermore, the robots are not able to act any different from what they are programmed to do. With the heavy application of robots, the humans may become overly dependent on the machines, losing their mental capacities. If the control of robots goes in the wrong hands, the robots may cause the destruction.

In conclusion, I suppose that we need to take advantages of A.I to make our life better, but remember its dangers and risks to take precaution timely.

Dịch:

Robot thông minh đóng một vai trò quan trọng trong thời hiện đại ngày nay. Ngoài lợi ích, chúng ta phải xem xét những bất lợi khi sử dụng chúng.

Trước tiên, hãy nhìn vào những điểm tích cực nhất. Nhờ robot và công nghệ A.I, số lượng lao động có thể giảm xuống nhưng năng suất thậm chí còn tăng nhiều hơn, đặc biệt là trong ngành chế tạo. Các robot có thể thực hiện các nhiệm vụ nhanh hơn con người và hơn nữa một cách nhất quán và chính xác. Chúng có thể làm việc tại các địa điểm 24/7 mà không cần có lương hay thực ăn. Ngoài ra, chúng không cảm thấy buồn chán. Trong y học, chúng giúp các bác sĩ chẩn đoán bệnh tật, phẫu thuật, đặc biệt là các tiểu phẫu với độ chính xác cao nhất. Ở một số bệnh viện, thú nuôi robot có thể giúp bệnh nhân trầm cảm và giữ họ hoạt động.

Ngược lại, robot tạo ra một số rắc rối. Đầu tiên nhất, đào tạo là cần thiết để vận hành hệ thống, do đó chúng ta cần phải trả cho các nhà khoa học và học viên, chi phí bảo dưỡng và sửa chữa, làm tăng chi phí tổng thể. Một điểm tôi muốn đề cập đến là sự cố máy móc, tạo ra nhiều rắc rối, và thậm chí đôi khi dẫn đến những tai nạn không ngờ đến. Đã được ghi nhận rằng một robot trong một nhà máy sản xuất xe hơi giết chết một công nhân. Điều này dẫn đến một sự đáng lo ngại của người sử dụng A.I cho mục đích y tế. Hơn nữa, các robot không thể hành động khác với những gì chúng được lập trình để làm. Với việc ứng dụng nhiều robot, con người có thể trở nên quá phụ thuộc vào máy móc, mất khả năng tinh thần của họ. Nếu sự kiểm soát của robot đi sai hướng, các robot có thể gây ra sự phá hủy.

Tóm lại, tôi cho rằng chúng ta cần tận dụng lợi thế của A.I để làm cho cuộc sống của chúng ta tốt hơn, nhưng hãy nhớ đến những nguy cơ và rủi ro của nó để kịp thời phòng ngừa.

You can use this to refer:

Intelligent Robots play a vital role in modern days. Besides benefits, we must consider disadvantages when using them.

First, look at the most positive points. Thanks to robots and A.I technology, the number of workforce can be reduced but the production even increases more, especially in the manufacturing industry. The robots can perform the tasks faster than the humans and much more consistently and accurately. They can work at places 24/7 without any salary and food. Additionally, they don’t get bored. In medicine, they helps doctors to diagnose diseases, do the surgeries, especially tiny surgeries with highest accuracy. In some hospitals, the robo pets can help the patients with depression and they keep them active.

On the contrary, robots bring about some troubles. First and for most, training is needed to operate the system, so we need to pay for scientists and trainees, maintenance and reparation expenditure, which raise the cost overall. Another point I’d to mention is the machine malfunction, which creates lots of troubles and confusions, and even sometimes lead to unexpected accidents. It’s reported that a robot in a car manufacturing factory killed a worker. This results in a worrisome of people using A.I for medical purposes. Furthermore, the robots are not able to act any different from what they are programmed to do. With the heavy application of robots, the humans may become overly dependent on the machines, losing their mental capacities. If the control of robots goes in the wrong hands, the robots may cause the destruction.

In conclusion, I suppose that we need to take advantages of A.I to make our life better, but remember its dangers and risks to take precaution timely.