(2) Demography: 654.38+0 million;

(3) Geographical area: 1 1,000 square kilometers;

(4) Distance between the Earth and the Moon: 384,000 kilometers apart;

(5) Light speed: 300,000 kilometers per second;

(6) China's marine area: about 4.7 million square kilometers.

(7) There are about 6,543,800 human hairs, of which the length is the longest, especially for women. Some can grow to 95 ~ 100 cm, even 150cm, but not more than 200cm. Hair is mainly used to protect the head besides enhancing the aesthetic feeling. Soft and fluffy hair is elastic, which can resist light collision and help head sweat evaporate.

More than 10,000 people use:

How much can the record cost: ten thousand yuan.

The recording distance can reach 10 thousand meters.

How many things can you record? Ten thousand dollars.

You can use 10 thousand tons to record the weight.

How many people can you record? Ten thousand people.