2010届高二英语升级考试精品专题辅导（七）
高二 Units 13 - 14
☆重点句型☆
1. Life in the oceans range from the tiniest plants all the way up to giants like sharks and whales.
2. Water is actually quite simple, but the way the water molecule is formed gives water its unique properties.
3. They form a polar molecule, that is, one with a slightly positive end and a slightly negative end.
4. The salinity of the earth's oceans is about thirty-five parts per thousand, meaning that there are about 35 grammes of dissolved solids and gases in one kilo of water.
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