Eratosthenes calculated the earth's circumference, giving it a circumference of about____miles, compared with the current equatorial circumference of about 24 902 miles.
A: 18000
B: 25000
C: 20000
D: 27000
A: 18000
B: 25000
C: 20000
D: 27000
举一反三
- Under normal circumstances, a child's bust circumference is approximately equal to the head circumference at the age of one year. The head circumference begins to exceed the bust circumference after one year old
- What is the head circumference when an infant is about 2 years old?
- Under normal circumstances, a child's bust circumference is approximately equal to the head circumference at the age of one year. The head circumference begins to exceed the bust circumference after one year old A: 正确 B: 错误
- The approximate average values of weight length and head circumference 1-year-old children are A: weight 15kg, length 65cm, head circumference 46cm B: weight 15kg, length 75cm, head circumference 50cm C: weight 10kg, length 75cm, head circumference 46cm D: weight 10kg, length 65cm , head circumference 46cm E: weight 10kg, length 75cm, head circumference 46cm
- bear ___________ A: circumference B: likeness C: ultimately D: boost