下列分散系中分散质粒子最大的是
A 蔗糖溶液 B 少量植物油和水的乳浊液
C 牛奶 D 硫酸溶液
答案:B
When the spaceship travelled above, _____ new-looking earth appeared before us, _____ earth that we
had never seen before. [ ]
A. the, an
B. a, an
C. ×, the
D. a, the
实例表明,涂敷石油沥青防腐层的管道遭受杂散电流腐蚀后,腐蚀坑周围石油沥青完全()。
A.剥离
B.腐蚀
C.炭化
D.老化