Cho A(1;-2), B(1;2). Viết phương trình tham số của đường trung tuyến BM.

Cho 3 điểm A(1;-2), B(1;2); O(0;0). Chứng minh tam giác OAB là tam giác gì? Vì sao

1. Do you fancy going for a walk?

-> Would you like ____________ 

2. Seeing Nelson Mandela will always stay in my memory

-> I'll never forget __________

3. It was difficult for me to stop laughing at wendy's letter.

-> I couldn't help _________________

4. Promise to try harder or I won't help you.

-> If you____________

5. Your parents' house is still in Nha Trang, isn't it?

-> Your parents still_______

SENTENCE TRANSFORMATION

1. You talk more than you work. I want you to work more than to talk.

I wish ________

2. Promise to try harder or I won't help you

If you _________

3. You will get wet in the rain if you don't put on the raincoat

Unless _________

4. We don't allow smoking in the restaurant.

Smoking ________

5. Someone has moved my chair.

My chair __________

6. They invited two hundred people to the party

Two hundred people __________

7. " Please don't drive so fast!"

Ann begged her friend ________

Hãy viết hai phương trình hóa học trong mỗi trường hợp sau đây :

– Kim loại tác dụng với oxi tạo thành oxit bazơ.

– Kim loại tác dụng với phi kim tạo thành muối.

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