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DINO CLUB

Know your body

作者:21ST
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人体的奥秘

1.The brain is made of ______ water.

A. no

B. about 20%

C. about 80%

2.The biggest part of your body is _____.

A. skin

B. muscle1

C. fat

3.Your ____ will never stop growing. They grow about 0.22mm every year.
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