A.涂滿B.空出一條縫C.涂出來D.多留點(diǎn)空隙
A.60°B.45°C.30°D.15o
A.質(zhì)地粗糙B.不易揮發(fā)C.質(zhì)地細(xì)膩D.質(zhì)地細(xì)膩,易干