A:溶液呈电中性,胶体带电荷
B:溶液中通过一束光线出现明显光路,胶体中通过一束光线没有特殊现象
C:溶液中溶质粒子能通过滤纸,胶体中分散质粒子不能通过滤纸
D:溶液与胶体的本质区别在于分散质微粒直径大小,前者小于1nm,后者介于1nm和100nm之间
数轴上的A点表示的数是﹣3,数轴上另一点B到A点的距离是2,则B点所表示的数是____
影响城市空气质量的因素是( )
He had hoped to have an opportunity to travel abroad for long. But it was a(n) ______ that he missed it when it came last month.