單項(xiàng)選擇題三面投影圖的關(guān)系是:(),稱為“三等關(guān)系”

A.長(zhǎng)相等、寬對(duì)正、高平齊
B.長(zhǎng)對(duì)正、寬平齊、高相等
C.長(zhǎng)平齊、寬相等、高對(duì)正
D.長(zhǎng)對(duì)正、寬相等、高平齊