Wateris_____totheexistenceofallformsoflife. A: vital B: genuine C: important D: superior

【判断题】Dai people hold Water-Splashing Festival each year as they think wateris the symbo of wealth and power.

Wateris<spanstyle="text-decoration:underline;">chronically</span>scarceinSouthernCalifornia. A: disagreeably B: unseasonably C: persistently D: momentously

Label each of the following as either a physical process or a chemical process:(a)rusting of a metal can is a process;(b)boiling a cup of wateris a process;(c)pulverizing an aspirinis a process;(d)digesting a candy baris a process;(e)exploding of nitroglycerinis a process.

In many places, tap wateris both clean and ____1__. In fact, there are more unhealthy chemicals in bottled water. These ____2__ come from the plastic. Here’s another fact: Most bottled water is the same as tap water. Both tap and ____3__ water come from rivers and lakes. But bottled water is more expensive. It costs almost a ____4__ times more than tap water. Putting water in bottles also wastes water. Water is used to clean bottles first, and this is ___5____. Of course, in some places, people need to drink bottled water. The tap water isn’t clean in those places. But this must ____6__. Eighty percent of plastic bottles go in the trash. And this is very bad for our ___7____.