單項(xiàng)選擇題
A.10%,10%B.10%,15%C.15%,10%D.15%,15%
A.15kg/m3B.20kg/m3C.25kg/m3D.30kg/m3
A.125gB.175gC.225gD.250g
A.三級(jí)水B.離子水C.加熱并迅速冷化的純凈水D.無(wú)水煤油
A.20℃±1℃,90%B.20℃±2℃,95%C.20℃±1℃,95%D.20℃±2℃,90%
A.1:0.5B.1:2C.1:1D.1:0.45
A.50±10,2400±200B.50±10,2000±200C.80±10,2400±200D.80±10,2000±200
A.35μmB.45μmC.50μmD.80μm
A.1.18B.2.36C.4.75D.9.5
A.10h:24minB.10h:25minC.10h:32minD.10h:30min
A.1/3B.1/2C.2/3D.3/4