Tại sao máu có tác nhân gây bệnh HIV , và viêm gan B , ... Tại sao lại không truyền được cho người khác ?

illiterate              face to face                    physical strict rules              street vendors                seniority
1. Paying respect to people of ___________ is a tradition in Viet Nam.

2. Quite a large number of ethnic people in the mountains are still ___________. They can't read or write.

3. Eating from ___________ is a popular habit of people in big cities in Viet Nam.

4. There should be ___________ on the roads to reduce the number of accidents.

5. ___________ punishment was common at schools in the past.

6. I prefer talking ___________ to talking on the phone.

tradition                        habit                           behaviour                         practice
1. It's never easy to break a bad ____________.

2. His bold ____________ shocked everybody present.

3. It runs as a ____________ in Viet Nam that elderly grandparents and parents are taken care of by their children until they die.

4. It was his ____________ to take a nap after lunch.

5. Using blackboards and chalk as the only teaching aid is still a common ____________ in most developing countries.

6. He could be fired for his rude ____________ towards the VIP guest.

1. go

2. collect

3. entertain

4. dance

5. act out

6. use

7. preserve

8. keep

a. our traditions

b. to drum music

c. a diary

d. your imagination

e. bare-footed

f. stories

g. themselves

h. the post

Xét tính đồng biến, nghịch biến của hàm số $f\left(x\right)=4x^2-3x+2021$ trên $\left(\frac{3}{8};+\infty \right)$

Theo em chúng ta cần rèn luyện tính dân chủ và kỉ luật như thế nào

cho y=2x^2 , y=2x+4

vẽ đồ thị 2 hàm số trên cùng 1 mp tọa độ