Nếu lấy hệ quy chiếu là vòng tròn A,

Do bán kính hình tròn B gấp 3 lần bán kính hình tròn A, nên chu vi của hình tròn B cũng gấp 3 lần chu vi của hình tròn A.

Mà mỗi khi lăn được 1 vòng, hình tròn A lại đi được một quãng đường bằng  chu vi của nó.

Vậy để lăn xung quanh hình B, A phải thực hiện 3 vòng quay để quay lại điểm xuất phát.

Nhưng nếu hệ quy chiếu không nằm trên vòng A, nó đã quay được 4 vòng, vòng thứ tư là do vòng tròn B tặng thêm.

\(=61\)

= 61 á ông

minh.

có em nè 

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.

Áp lực F = P = 650 N. Áp suất p = F/S = 650/0.016 = 40625 Pa

Vì cô tài giỏi hơn bạn ấy nhìu

??????????????? ko hỉu

đây là câu hỏi à

                                 4000000000000000000000000000000000000000000000000000000000000000000

mik chịu nhen 

J dzậy tr :)

tat nhien la ko ℗•℗

một hai sáu sáu bốn chín hắt xì hơi................

dài vậy trời, mik ko bít