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24 tháng 9 2021

Biến thể cách phát âm của giới từ "at" trong câu or context cụ thể:

- Bình thường "at" được phiên âm là /æt/

- Nhưng trong 1 câu nói cụ thể "at" có thể được phiên âm là /ət/ hoặc /əd/:

+ là /ət/ khi next sound là consonants (phụ âm)

+ là /əd/ khi next sound là vowels or dipthongs (nguyên âm và nguyên âm đôi hay bán nguyên âm) và khi đó "d" được nối âm với nguyên âm hoặc bán nguyên âm đứng sau nó VD:

+ at school /ət 'skul/

+ at the corner /ədə 'konə/

+ "sort of" as in the sentence: noodle is a sort of gross /'nu:dl zə 'sɔ:də 'grɔs/ (mì là loại đồ thô)

Combinatorics21. 15 students join a competition. Only top 5 students can be promoted to next round. How many different way(s) of promotion advance is / are there?Different way: Cách khác nhau.22. It is known that there are 8 classes of grade 5 in a primary school. At least how many students are there in grade 5 to ensure there exist 41 students in the same class?At least: Ít nhất; Ensure: Chắc chắn; Exist: Tồn tại.23. Choose 3 digits from 1, 2, 3, 4, 6, 8 and 0 to form...
Đọc tiếp

Combinatorics
21. 15 students join a competition. Only top 5 students can be promoted to next round. How many different way(s) of promotion advance is / are there?
Different way: Cách khác nhau.
22. It is known that there are 8 classes of grade 5 in a primary school. At least how many students are there in grade 5 to ensure there exist 41 students in the same class?
At least: Ít nhất; Ensure: Chắc chắn; Exist: Tồn tại.
23. Choose 3 digits from 1, 2, 3, 4, 6, 8 and 0 to form 3-digit numbers. How many even number(s) greater than 300 is / are there? (The repetition of digits is not allowed)
Digit: Chữ số; 3-digit number: Số có 3 chữ số; Even number: Số chẵn; Greater than: Lớn hơn; Repetition of digits is not allowed: Các chữ số không được lặp lại.
24. A flight of stairs has 10 steps. Peter can go up for 1 step, 2 steps or 3 steps each time. How many way(s) is / are there for Peter to go up the stairs?
Step: Bước; Way: Cách.
25. Numbers are drawn from 80 integers 20 to 99. At least how many number(s) is / are drawn at random to ensure that there are two numbers whose sum is 85?
Integer: Số nguyên; At least: Ít nhất; Random: Ngẫu nhiên; Ensure: Chắc chắn; Sum: Tổng.
~ End of Paper ~
  

6
13 tháng 4 2022

là seo pạn?mik hem hỉu??????????????????????

13 tháng 4 2022

Đọc cái bài mà mún trầm kẻm!

Combinatorics21. 15 students join a competition. Only top 5 students can be promoted to next round. How many different way(s) of promotion advance is / are there?Different way: Cách khác nhau.22. It is known that there are 8 classes of grade 5 in a primary school. At least how many students are there in grade 5 to ensure there exist 41 students in the same class?At least: Ít nhất; Ensure: Chắc chắn; Exist: Tồn tại.23. Choose 3 digits from 1, 2, 3, 4, 6, 8 and 0 to form...
Đọc tiếp

Combinatorics
21. 15 students join a competition. Only top 5 students can be promoted to next round. How many different way(s) of promotion advance is / are there?
Different way: Cách khác nhau.

22. It is known that there are 8 classes of grade 5 in a primary school. At least how many students are there in grade 5 to ensure there exist 41 students in the same class?
At least: Ít nhất; Ensure: Chắc chắn; Exist: Tồn tại.

23. Choose 3 digits from 1, 2, 3, 4, 6, 8 and 0 to form 3-digit numbers. How many even number(s) greater than 300 is / are there? (The repetition of digits is not allowed)
Digit: Chữ số; 3-digit number: Số có 3 chữ số; Even number: Số chẵn; Greater than: Lớn hơn; Repetition of digits is not allowed: Các chữ số không được lặp lại.

24. A flight of stairs has 10 steps. Peter can go up for 1 step, 2 steps or 3 steps each time. How many way(s) is / are there for Peter to go up the stairs?
Step: Bước; Way: Cách.

25. Numbers are drawn from 80 integers 20 to 99. At least how many number(s) is / are drawn at random to ensure that there are two numbers whose sum is 85?
Integer: Số nguyên; At least: Ít nhất; Random: Ngẫu nhiên; Ensure: Chắc chắn; Sum: Tổng.
~ End of Paper ~

1
13 tháng 4 2022

chịu thoi khs quá

21 tháng 3 2016

55 được 1 số

- Tính các số có ba chữ số có ít nhất 2 chữ số 5:

TH1: a55 có 8 số vì a không chọn 0 và 5

TH2: 5a5 có 9 số vì a không chọn 5

TH3: 55a có 9 số vì a không chọn 5

số cuối cùng là 555

Vậy có tất cả"

1 + 8 + 9 + 9 + 1 = 28 số

20 tháng 3 2016

(1000-5):5+1=200 số

29 tháng 3 2016

Dịch: viết các số từ 1đến 1000 hỏi có bao nhiêu số chia hết cho 5.

Trả lời:

Số các số chia hết cho 5 là:

\(\frac{1000-5}{5}+1=200\)

Đs: 200 số

29 tháng 3 2016

Số lớn nhất chia hết cho 5 từ 1 đến 1000 là:1000

Số bé nhất chia hết cho 5 từ 1 đến 1000 là:5

Số số hạng chia hết cho 5 từ 1 đến 1000 là:

       (1000-5):5+1=200(số)

            Đáp số:200 số

I get a lot of letters at this time of year from many people who have a cold which won’t go away. There are many different stories about how to prevent or cure a cold. That’s why it is often difficult to know what to do. We know that colds are rarely "dangerous", except for weak people such as the elderly or young babies. These people are always uncomfortable and usually most unpleasant. Of course, you can buy a lot of medicines. They will help to make your cold less unpleasant. However, you...
Đọc tiếp

I get a lot of letters at this time of year from many people who have a cold which won’t go away. There are many different stories about how to prevent or cure a cold. That’s why it is often difficult to know what to do. We know that colds are rarely "dangerous", except for weak people such as the elderly or young babies. These people are always uncomfortable and usually most unpleasant. Of course, you can buy a lot of medicines. They will help to make your cold less unpleasant. However, you must remember that nothing can actually cure a cold or make it go away faster. Any strong medicine used to make you feel better could be dangerous if you are already taking drugs for some other illness. Thus, check with your chemist or doctor to see whether they are all right for you. And remember they might make you sleepy. Please don’t try to drive if they do! Lastly, whatever you may be told about magic foods or drinks, the best answer is to keep yourself strong and healthy. You’ll have less chance of catching a cold. And if you do, it shouldn’t be so bad.

28.         The writer of the passage wants _______.

A. to write in an amusing way

B. to give general advice

C. to complain about his/her health

D. to persuade people to have more foods and drinks

29.         Colds are _______.

     A. very dangerous                   B. not dangerous at all

     C. unpleasant                 D. usually fatal

30.         What is the key to avoid catching a cold?

     A. having magic foods and drinks    B. sleeping a lot

     C. taking a lot of medicines               D. keeping yourself strong and healthy

31.         The underlined word "most" as used in the passage is closest in meaning to _______.

     A. very                 B. in the highest degree

     C. greatest            D. absolutely

32.         The writer of the passage is probably _______.

     A. a nurse             B. a health care specialist

     C. a novelist                   D. a reporter

6
25 tháng 5 2022

B

C

D

A

B

19 tháng 8 2020
IV, Choose the best word from the box to complete the following paragraph (1,5 points) watching where or in fond forests

here are many ways of spending free time (1)............in............ Australia. Some people are (2).......fond.......of skiing in Snowy Mountain or riding a surfboard in Queensland. Others love watching Kangaroos and Koalas in the wild (3)........forests......... My sister says she only enjoys (4) watching Sydney from the skywalk. But I like going to Sydney Opera House (5),.........where........ the great opera singers of the world can be heard. If you are bored with listening to opera singing, there will always be at least two (6).........or........ three other shows to suit your taste.

19 tháng 8 2020
IV, Choose the best word from the box to complete the following paragraph (1,5 points) watching where or in fond forests

here are many ways of spending free time (1)...............in......... Australia. Some people are (2).......fond.......of skiing in Snowy Mountain or riding a surfboard in Queensland. Others love watching Kangaroos and Koalas in the wild (3)........forests......... My sister says she only enjoys (4) watching Sydney from the skywalk. But I like going to Sydney Opera House (5),........where......... the great opera singers of the world can be heard. If you are bored with listening to opera singing, there will always be at least two (6).........or........ three other shows to suit your taste.