This passage mainly tells usA.a story how a previously unknown Leonardo was discovered.B.s

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This passage mainly tells us

A.a story how a previously unknown Leonardo was discovered.

B.scholars" efforts in appreciating and examining a drawing.

C.Leonardo"s drawings are precious and hard to be found out.

D.authentication of a Leonardo is really complex and difficult.

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗