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21 tháng 1 2022

The hottest star is WR 102.

21 tháng 1 2022

????????

9 tháng 1 2022

A????

9 tháng 1 2022

B???

2 tháng 2 2022

(1)R136a1

(2)Sun

2 tháng 2 2022

R136a1 Diameter: 48 milion km Rigel Diameter: ? km

2 tháng 2 2017

419 nhe tai to cung chua chac dau nhe 

2 tháng 2 2017

hay giup do minh chut nha

2 tháng 2 2017

36 dung khong

11 tháng 9 2019

Đề bài là trả lời các câu hỏi hả bạn? Nguyễn Minh Tuyết

11 tháng 9 2019

đúng rồi bạn

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questionsStellar AstronomyMany parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.There are different types of stars...
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Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questions

Stellar Astronomy

Many parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.

There are different types of stars in the universe. For our purposes, we can classify them into two categories: variable and binary. Variable stars are those which show some degree of variability in their luminosity and magnitude. Luminosity refers to the amount of energy radiated by a star, while magnitude refers to its brightness. At time the degree of variability may be high, requiring a telescope with an equally high light- gathering power. This can be achieved by using a lens of large diameter, such as that of a reflecting telescope.

Binary stars are those found in pairs that revolve around a common center. The closest star to the sun, Proxima Centauri, is a binary star. To observe a binary star, the resolving power of a telescope - its ability to distinguish between two close objects having a small angular separation - must be very high.

Stellar astronomy is possible for a everyone, well beyond mere looking at the sky with the naked eye in order to identify constellations. With two basic of telescopes and rudimentary knowledge, much exploration can be achieved.

What is the topic of the passage?

A. Types of stars and how to observe them.


 

B. The differences between binary and variable stars


 

C. Types of telescopes


 

D. The color and temperature of stars


 

1
13 tháng 2 2018

Đáp án là A.

Các loại sao và làm thế nào để quan sát chúng. Đọc nội dung cả bài chúng ta dễ dàng chọn được đáp án này.

III.  Complete the following text, using the words in the box.saxophone                 art       band               concertpop star          singing           painting          subject          My friend’s name is Peter and he loves music. He is good at (1)  __________ and he can play the guitar. He wants to learn the (2)    when he is a bit older. He is already in a (3) _____________and they hope to play at the school (4)_____________ next term. He is also interested   in (5)___________ so...
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III.  Complete the following text, using the words in the box.

saxophone                 art       band               concert

pop star          singing           painting          subject

          My friend’s name is Peter and he loves music. He is good at (1)  __________ and he can play the guitar. He wants to learn the (2)    when he is a bit older. He is already in a (3) _____________and they hope to play at the school (4)_____________ next term. He is also interested   in (5)___________ so his favourite (6)      at school is (7)          . But to be honest, he can’t wait to leave school and become a (8)                         .

IV. Complete the following text, using the words in the box.

drums             rap      India               hands              weddings       trousers

        Bhangra is from (1)      and Pakistan. People traditionally played the music at harvest time and also to celebrate New Year and (2)            . The most traditional instrument is a type   of (3)          . Many modern pop artist mix Bhangra with hip hop and (4)       _______.  The dancers in Ayesha’s class learn the dance steps and how to move their (5) _________. Women wear colorful clothes including a   shirt, (6)_________  and a kind of scarf.

 V.  Rewrite the sentences using “not as … as”.

        The hotel in New York was better than the hotel in California.

…………………….....................................................................................................................

        French is easier than German.

…………………………………………………………………………………………………

         Rick is friendlier than Glenn.

…………………………………………………………………………………………………..

         Indonesia is hotter than Viet Nam.

…………………………………………………………………………………………………

         Football is more exciting than volleyball.

  ………………………………………………………………………………………………...

1
5 tháng 11 2021

III.  Complete the following text, using the words in the box.

saxophone                 art       band               concert

pop star          singing           painting          subject

          My friend’s name is Peter and he loves music. He is good at (1)  ______singing____ and he can play the guitar. He wants to learn the (2) saxophone    when he is a bit older. He is already in a (3) ____band________and they hope to play at the school (4)_______concert______ next term. He is also interested   in (5)_____painting______ so his favourite (6)    subject   at school is (7)     art      . But to be honest, he can’t wait to leave school and become a (8)   pop star                       .

IV. Complete the following text, using the words in the box.

drums             rap      India               hands              weddings       trousers

        Bhangra is from (1)   India   and Pakistan. People traditionally played the music at harvest time and also to celebrate New Year and (2)      weddings      . The most traditional instrument is a type   of (3)      drums    . Many modern pop artist mix Bhangra with hip hop and (4)       __rap _____.  The dancers in Ayesha’s class learn the dance steps and how to move their (5) ___hands______. Women wear colorful clothes including a   shirt, (6)__trousers_______  and a kind of scarf.

 V.  Rewrite the sentences using “not as … as”.

        The hotel in New York was better than the hotel in California.

……………The hotel in California was not as good as the hotel in New York……….....................................................................................................................

        French is easier than German.

……………German is not as easy as French……………………………………………………………………………………

         Rick is friendlier than Glenn.

………Glenn is not as friendly as Rick…………………………………………………………………………………………..

         Indonesia is hotter than Viet Nam.

……VN is not as got as Indonesia……………………………………………………………………………………………

         Football is more exciting than volleyball.

  ……Volleyball is not as exciting as football…………………………………………………………………………………………...

21 tháng 3 2021

Nhiệt kế y tế có giới hạn đo là :

    A. 0 oC đến 100 oC                  B. 0 oC đến 130 oC       C. 35 oC đến 42 oC     D. 35 oC đến 43 oC

21 tháng 3 2021

Nhiệt kế y tế có giới hạn đo là :

A. 0 oC đến 100 oC                 

B. 0 oC đến 130 oC      

C. 35 oC đến 42 oC    

D. 35 oC đến 43 oC