| 21. |
The progressive wave theory regarding of tides was put forth by |
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| 22. |
The original founders of Common wealth of Independent States, in December 1991, are |
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| 23. |
The Pyrenees mountains are located on the border between ____ and ____ |
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| 24. |
The process of evaporation of water in nature is one of the basic components of the hydrological cycle. The other process that is considered to be essential for the completion of hydrological cycle is the |
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| 25. |
The ocean water is saline due to |
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