單項(xiàng)選擇題
A.21.23 B.24.5 C.27.96
A.65351 B.56565 C.56500
A.要小一些 B.要大一些 C.可以相等
A.5489 B.3430 C.2468
A.浸析腐蝕、碳酸水的腐蝕、酸鹽腐蝕 B.反復(fù)凍融腐蝕、浸析腐蝕、碳酸水的腐蝕 C.碳酸水的腐蝕、反復(fù)凍融腐蝕、酸鹽腐蝕
A.成正比 B.成反比 C.無(wú)關(guān)
A.0.8--1 B.0.5-0.7 C.1.0-1.5
A.C3A•6H2O+3(CaSO4•2H2O)+19H2O=C3A•3CaSO4•31H2O B.C3S•6H2O+3(CaSO4•2H2O)+19H2O=C3A•3CaSO4•31H2O C.C4AF•6H2O+3(CaSO4•2H2O)+19H2O=C3A•3CaSO4•31H2O
A.產(chǎn)量 B.質(zhì)量 C.產(chǎn)量和質(zhì)量
A.假凝 B.快凝 C.緩凝
A.<100% B.200-300% C.>300%