下列不属于净化水的措施是（ ）
A：吸附
B：过滤
C：电解
D：蒸馏
— Linda, don't give out too much ________ information to strangers on line. It's dangerous.
— OK, Mum. I promise I will learn your words ________.
Daniel likes ________ basketball, but he ________ at home right now.
如图所示，用磁铁的N极在钢棒AB上从A端向B端反复摩擦几次后，钢棒就具有了磁性，这种现象称为 ____ ，并且钢棒的A端为 ____ 极。
