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内积空间一定是()
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Directions: Fill in the blanks according Reading 1.1. global water ____________ 全球缺水2. ____________ on 依靠，依赖3. _______ the form of 以…形式4. in _________ of 就…而言；按照5. _____________water crises 遭遇水危机6. a ___________ of …的问题7. at ________ 拂晓时8. as a _________结果9. ____________ to quality water获得优质水10. economic __________ 经济繁荣11. ___________ living standards 改善生活水平12. There is a __________ chance that… 很有可能…13. water ____________ areas缺水地区14. look __________ for sth. 关注15. in _________ 事实上，实际上
Directions: Fill in the blanks according the text in Unit 5.1. to __________ water节水2. to one's ___________中意，称心3. __________ in one's ears 犹言在耳4. to ___________ sb. time 争取时间5. on __________ 步入…轨道；有望6. a ____________ resource 战略资源7. in ______________ order of importance 按重要性递减排序8. and so _________ 等等9. ____________ the corner 不远，即将到来10. go __________下降11. on the ____________of 正要…12. be __________________ with 交织，缠绕，错综复杂13. be ____________ with 面对14. in the long-range _____________ of humanity 有利于人类的长期利益
Directions: Fill in the blamks according to Reading 2.1. a _________ concern 主要关注点2. __________ pollution 人为污染3. natural ____________ 自然污染4. come in ___________ with 接触5. on the _____________ 大体上，基本上6. be held ______________ for 被认为应对…负责7. ____________ the aquatic ecological system恢复水生态系统8. rest ____________ 尽管放心9. in the ___________ 同时10. _________out 找到（解答）；作出11. a ___________, long-term solution 可持续的长期的解决办法
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