A.4% B.5% C.6% D.3%
A.垂直 B.水平 C.傾斜45° D.傾斜15°
A.經(jīng)嚴(yán)格檢查合格后 B.做好記號(hào)后 C.稱量質(zhì)量后 D.漆刷油漆后