viết chương trình nhập từu bàn phím số nguyên dương n và dãy A gồm n số nguyên A1, A2,...,An sau đó in ra màn hình trung bình cộng các phần tử chẵn trong dãy A

Bài 1: Cho ba điểm A, B, C nằm trên hệ trục tọa độ Đề Các, có tọa độ lần lượt là (XA, YA), (XB, YB), (XC, YC).

Tìm khoảng cách lớn nhất d giữa hai điểm trong 3 điểm trên

Yêu cầu: Tính giá trị của d.

Dữ liệu vào: Từ bàn phím gồm 3 dòng, mỗi dòng chứa hai số nguyên:

- Dòng 1 gồm hai số nguyên XA, YA;

- Dòng 2 gồm hai số nguyên XB, YB;

- Dòng 3 gồm hai số nguyên XC, YC.

Dữ liệu ra: Ghi ra màn hình giá trị của d với định dạng d:0:2

Ví dụ:

Complete the second sentence so that it has a similar meaning to the first

1. Peter said he wasn’t feeling well then.

-> Peter said: “I ………………………………………………………………………………

2. Old car tires are recycled to make shoes and sandals.

- People …………………………………………………………………........……………..

3. I’m very sad that I wasn’t accepted in that group.

- I’m very sad not …………………………………………………………..........………….

4. It’s three years since I last spoke to her.

- I haven’t ……………………………………………………………….......………………

5. Lan will be fifteen next week.

- It is Lan’s ……………………………………………………………….......……………..

6. How long is it since you used the pen?

- When ………………………………………………………………….................……….?

7. Has anyone asked you for your opinions?

-> Have ...........………………………………………………………………………………

8. I had a dog once, but I don’t have anymore.

-> I ……………………………………………….…………………………………………

9. It isn’t necessary for you to set off early.

-> You don’t ……………………………..............……………………………………........

10. I spend half an hour traveling to work by motorbike everyday.

-> It takes ……………………………………………………………………………………

Fill in each numbered blank with one suitable word.

We have a alarm-clock. It was (1)...........................…... in 1867. It was a Swiss made. My father likes (2)….............................very much because it is a present (3)....................…... Mr. Anderson, a friend of (4)…………..….….... Mr. Anderson (5)……….…………..... my grandfather (6)…........................his 80^th birthday. It always keeps good (7)...............…....

(8)…......................................to it, we never get (9)….............................................late.

It has a good sound when it (10)....................…...the time. It is a precious thing in our family.

Give the correct form of the words in capital letter to complete the sentences.

1. Finally they were able to rescue the people trapped in the burning house

2. Poisonous gases occur in the air naturally.

3. How far is your house from your office?

4 Since paper, many other products can be recycled.

5. There are some differences between the two programs.

6. We are having a birthday party on Saturday night

7. What would you do if someone broken in your house?

8. I got up late this morning because my alarm clock didn’t go on

9. I don’t know the meaning of this word. I’ll look it..............................................

10. She fell ............................................ her bike and hit her head on the road.