短文改错。

      Grandma Moses was crazy about painting soon before she picked it up and worked hard at it.

She painted careful and her works were nice.She first painted only to please oneself, and then began

to sell her works with a little money.In 1993, a collector, Louis Caldor happen to see several of

Grandma Moses'work hanging in a shop.He liked them, buying them at once, and set out to look for

less.Caldor held a show to introduce the works of Grandma Moses other artists.Grandma Moses, who

was worldfamous, was died on December 13,1961, at the age of 101.

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正常人胸廓的前后径与横径之比为（）。