1. A

2. C

3. B

4. A

1) A

2) C

3) B

4) A

In đậm từ thâm khảo nhé!

kh đấy :)

giúp mk vs năg nỉ đấy m.n ơi

Vinh is my province .Vinh City is a center of economics, politics and convergence of human and natural resources as well as the essence of Nghe.Vinh City is 291 km from Ha Noi, 1,418 km from Ho Chi Minh City and 452 km from Da Nang.
Vinh City is one of the tourist centers of Nghe An Province and is an important destination in the Central Heritage Route tour. The city has many monuments, including 14 national temples ranked at national level, 16 classified relics of Nghe An province.
Vinh city has a long history, spanning centuries from Ke Van (Nom script), Ke Vinh (in Chinese) and Vinh Giang, Vinh Doanh later transformed into Vinh Thi. And then the Western Europeans called Vinh (Vinh calls without a seal) and since 1789 to date from Vinh was named for this city.
The terrain of Vinh city is composed of two sources of silt, namely the Lam river silt and the silt of the South China Sea. After the Lam River changed its flow to Rum Rum, there was more sunken area and alluvial deposits gradually filled up. The terrain is high and flat but not monotonous, with majestic Mount Dung Decision and the romantic Lam River around it, creating a natural and harmonious landscape of the city.
Vinh City is located in tropical monsoon climate, there are two distinct seasons and fluctuations from season to season. The average temperature is 24 ° C, the average humidity is 85-90%.Average hours of sunshine are 1,696 hours. Radiant energy is plentiful, the annual average rainfall of 2,000mm is suitable for growing crops.
Coming to Vinh, tourists can enjoy specialties such as Vinh and eel porridge and visit attractive tourist spots in the city such as Nghe An ancient town, Quyet Mountain, Can Linh pagoda, Hong Son temple, Vinh market. , Museums (Nghe An general museum, museum of Xo Viet Nghe Tinh, Military IV museum), park (Cua Nam lake park, Nguyen Tat Thanh park, city center park with monument Uncle Ho and Ho Chi Minh Square) ... and participate in Hong Son Temple Festival, held on March 3 and August 20 lunar calendar.

a: Xét tứ giác ADHE có 

\(\widehat{ADH}=\widehat{AEH}=\widehat{DAE}=90^0\)

Do đó: ADHE là hình chữ nhật

\(a^3+3a^2b+3ab^2+b^3-2022=\left(a+b\right)^3-2022=\left(2021-2020\right)^3-2022=1-2022=-2021\)

đi ngủ đi iem à, trễ gòi :v