1, AD year: The year when Jesus was born was the first year of AD, before XX BC, then XX AD. (When recording time, start from the middle and extend from left to right. )
2. Century: One hundred years is a century. The period from 1 to 100 is 1 century.
3. Read the time from left to right. Therefore, the greater the number of BC, the earlier the time; After the first year of AD, the smaller the number, the earlier the time.
4. In 2070 BC, we can do this: take 2050 BC as the boundary, and 2070 BC is before 2050 BC, so 2070 BC is the early stage of 2 1 century BC.
nanyf？ 1-2 1 23:22
BC is viewed backwards, such as Qin Shihuang (259 BC-2 BC10).
Born in 259 BC, he unified China in 22 1 BC and died in 2 10 BC. Just like the negative numbers we learn, for example: -5 -4 -3 -2-1 0 1 2 3 4 5 Time passes from left to right (can you understand).
A
xxxt352606775？ 1- 16 20: 18
Choose a for this question. Late 20th century BC.
1, AD year: The year when Jesus was born was the first year of AD, which used to be XX BC, and now it is XX AD. (When recording time, start from both ends and extend from left to right. )
2. Century: One hundred years is a century. The period from 1 to 100 is 1 century.
3. When reading, read from left to right. Therefore, the greater the number of BC, the earlier the time; After the first year of AD, the smaller the number, the earlier the time.
4. In 2070 BC, we can do this: take 2050 BC as the boundary, and 2070 BC is before 2050 BC, so 2070 BC is the late 2 1 century BC.
Nerd? 1-24 12:5 1
265438 BC+early 20th century. Because the chronology of BC is that the more numbers, the earlier the age. You can draw a number axis, with 2050 BC as the boundary, 2070 BC before 2050 BC, and 2050 BC is the middle of 2 1 century BC, so 2070 BC is the early of 2 1 century BC.
The misty stars? 1- 16 20:20
B.c. and a.d. are just like the x axis of the XY axis. 0 is the first year of AD, how many years of BC is -X, and the year of AD is X..
The greater the BC number, the more to the left. According to 2070 BC, C and D were excluded.
The number of years in BC is gradually decreasing, and 2070 BC is 30 years after 2 100 BC.
30 years is the beginning of the century. Choose A. I am a junior high school student.