A.愈細(xì)就愈少,愈粗就愈多B.愈細(xì)就愈少,愈粗也要少C.與卡子直徑無關(guān)D.與卡子間距無關(guān)
A.21.6tB.23tC.24tD.27t
A.6m×6mB.6m×7mC.10.6m×6mD.6.4m×6.4m