單項選擇題以下比喻恰當?shù)氖牵ǎ?/strong>

A.母乳是直接經(jīng)驗
B.母乳是間接經(jīng)驗
C.紙幣是直接經(jīng)驗
D.儲備金是間接經(jīng)驗