5、冰冻的；极冷的　　　　　　　　　 6、纯净的；纯粹的

3、唯一的；独特的　　　　　　　　　 4、相对的；比较而言

1、海员；水手　　　　　　　　　　　 2、运输；运送

3. A. Even though the pure water is sth. that gives sea water its main properties, the salinity of the sea water affects both its weight and freezing point.

　 B. Even though the pure water is ______ gives sea water its main properties, the salinity of the sea water has ______ ______both its weight and freezing point.

　　　　　　　　　 高二(下)Unit 13词汇测试

2. A. What makes ocean such a great place to live?

　 B. What ______ ______ ______ makes ocean such a great place to live?

1. A. There’re about 5 million species in the ocean and we have yet to learn much about them.

　 B. There’re about 5 million species in the ocean, about ______ ______ ______ much waiting for us to learn.

10.The water in the ocean also keeps the temperature of the earth steadily by absorbing and releasing heat.

9. Since estuaries protect animals and plants and prevent erosion, protect them is very important.

8. The creatures on the ocean floor manage to survive without sunlight and getting energy from other sources.

7. Water is a liquid at room temperature and has a relatively high frozen point.