đây ạ
Trong thiên nhiên, silic có 3 đồng vị là 28Si (92,23%); 29Si (4,67%) và 30Si (3,1%) với các nguyên tử khối tương ứng là 27,977; 28,976 và 29,974. Hãy tính nguyên tử khối trung bình của Si. giúp em vớii
viết về sở thích của bạn ( nghe nhạc đặc biệt là nhạc kpop : blackpink ) ko cop mạng nha
Giúp em giải với ạ em đang cần gấp
Có 2 bài thui giúp mk vs hứa5*+ctlhn kíuuuuuu
Mọi người giúp em câu d với ạ em cần gấp ạ
I. Choose the word whose underlined part is pronounced differently from that of the others 1. A. prize B. drill C. brick D. trim 2. A. broom B. proof C. blood D. troop 3. A. practice B. cracker C. tractor D. bracelet 4. A. trophy B. problem C. broccoli D. drop 5. A. trunk B. prudential C. brush D. crush Vocabulary II.Choose the words/ phrases in the box to fill the gaps. staying indoors hang out playing football doing DIY walking eating out watching TV 1.To many American teenagers, the shopping mall is one of the top destinations to see friends and……………………. 2. People in Singapore love……………. You can find food courts almost everywhere in this city state. 3. ………………..is the most popular individual outdoor activity in the UK. 4. These days a lot of children prefer…………..and………………to playing outside. 5. When you do team sports such as…………….. you develop team spirit too. 6. If you have to do home improvements,…………………is a good way to save money. III. Fill each blank with a word/ phrase in the box. melodies leisure time making crafts games doing skateboarding leisure activities the most comics reading 1. Nick has just bought a CD of Vietnamese folk songs and he thinks he’ll enjoy listening to the ____________. 2. While Nick was learning Japanese, he liked ______________ Doraemon. 3. My friends gave me some interesting short stories on my birthday because they know that I like reading__________. 4. Tam lives near the coast of Da Nang so he likes playing beach __________ with his friends after school. 5. Hobbies such as collecting stamps or___________ are very interesting. 6. How much _____________ do people in the US have on average day? 7. Minh hates _____________ the same thing every day. 8. What are the three activities that pupil in Viet Nam do __________ in their free time?. 9. How much time a day do you spend on _______________, Phuc?. 10. Which activity do you like best, football, badminton or______________?
Tính nhanh tổng các số chẵn từ 20 đến 40 ai giải hộ em bài này với
Cơ sở hình thành của quân đội nhân dân VN ? Các đội vũ trang đầu của quân đội nhân dân VN ?
Trên hình là đồ thị toạ độ- thời gian của một vật chuyển động. Hãy cho biết a) Vận tốc của vật trong mỗi giai đoạn b) Quãng đường của vật đi được trong mười giây đầu tiên và trong giây thứ mười
III. Choose the word or phrase among A, B, C or D that best fits the blanks space in the following passage. The country and the city have advantages and (1)____________. People in the country live in more beautiful surroundings. They enjoy (2)__________ and quietness, and can do their work at their (3)____________ pace because no one is in a (4)______________. They live in larger, more comfortable houses, and their neighbors are more friendly, and ready to help them (5)_____________ they need it. Their life, however, can be (6)____________ and they may be isolated, which is serious problem (7)____________ they are ill or want to take children to school. The city has all the services that the country lacks, but it (8)___________ has a lot of disadvantages. Cities are often polluted. They not (9)_____________ have polluted air but also have noisy streets. Everyone is always in hurry and this (10)______________ that people have no time to get to know each other and make friends. 1. A. Joy B. Enjoyment C. happiness D. disadvantages 2. A. Quiet B. Quietly C. peace D. peaceful 3. A. Less B. Own C. just D. only 4. A. Hurry B. Hurried C. hurriedly D. hurrying 5. A. When B. Which C. what D. that 6. A. bore B. Bored C. boring D. bores 7 A. unless B. Because C. although D. if 8. A. also B. Yet C. already D. so 9. A. never B. Ever C. hardly D. only 10. A. aims B. Means C. asks D. said
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