再生度是指（）。
参考答案：离子交换基剂层中已再生离子量占其全交换容量的份额
如图所示，将等物质量的Cl2和CH4充入一容积为25mL的量筒，并将量筒倒置在盛有饱和食盐水的水槽中，用日光散射，可观察到的现象是
①_______________②_______________③_______________④_______________
The prices of pirated (盗版) DVDs are lower because they take advantage of others' _____ ideas without
paying for the right to do so. [ ]
A. early
B. special
C. precious
D. original
