d=D.10

Vietnam is famous for its several holiday and festival, especially Tet holiday. It takes place from the first day of the first month of the lunar calendar until at least the third day. Although occurring in short period of time, it is believed to be the most important and popular holiday in Vietnam. There are many special food are made so as to prepare for Tet meal such as: sticky square cake, Vietnamese sausage, sticky rice and jam. The food is thought to reflect Vietnam’s habit and custom as well as Vietnamese’s lifestyle. Besides, the meal has other dishes like fish, vegetable to show the hope for a successful and prosperous new year. In term of customs, children’s receiving red envelop from the elder, visiting relative’s houses and going to church are popular activities. Giving lucky money is thought to bring children hope and health. Church is the symbol of peace; therefore, individual go there and pray for successive year. Traditionally, the house is designed with peach flower in the North and Ochna integerrima in the south part of Vietnam. Besides, the house as well as town are clear, decorative and beautiful as all are ready to start a new year. People have cozy atmosphere and enjoy joyful time with their family’s members. It’s high time for people living at different parts of country gathering and spending time together. Tet is a chance for one to come back home after many stress and pressure of studying and working environment. Tet is not simply a holiday, it is culture and habit of Vietnamese since its deep meaning is sacred and important. All in all, Tet includes not only joy but also long-standing event in people’s soul as it helps one grow up through experience.

chọn câu c:190

m=V.D=0,5.7800=3900(kg) 

suy ra m=3900kg

a) 5⁶

b) 6⁴

c) 2³.3²

d) 10⁵

D=m:v =7800:0,5=15600 kg_m³ 

suy ra :cột sắt có KL là15600 kg_m³

chứng tỏ rằng : A = 2 + 2²+2³+2⁴+......+2⁹⁹ + 91 CHIA HẾT cho  7

Những khó khăn của nước ta ở đời Vua Hùng thứ18 

-xảy ra xung đột làm xã hộĩ mất ồn định

-sự phân biệt người giàu

-người nghèo ngày càng tăng

-nghề trồng lúa nước ở quen sông gặp khó khăn

-lũ lụt,hạn hán ảnh hưởng lớn đến thu hoạch

Khó khăn trở thành nguy cơ đe dọa đến sự tổn vong của đất nước là xảy ra xungđột làm xã hội mát ổn định vì như vậy có thề đẩn tới chiến tranh làm cho nước ngoài

có nguy cơ xâm lược

Lấy đầy can 3 lít đổ sang can 5 lít ⇒ Can 5 lít cần 2 lít nữa để thì đầy

- Lấy đầy can 3 lít đổ tiếp sang can 5 lít ⇒Còn dư 1 lít ở can 3 lít