题目

 --- Is there any possibility ________ we can get a ticket for The 2010 Shanghai World Expo?  --- Of course, yes. You can either go to the Expo in person or buy ________ through the Internet. A. which; it                       B. that; it                   C. that; one                D. which; it 答案：C下列质量增加的变化有一种与其它三种存在本质的区别，这种变化是（ ）A．长期放置在空气中的氢氧化钠质量增加B．久置的生石灰质量增加C．长期敞口放置的浓硫酸质量增加D．久置的铁钉生锈质量增加