MCQOPTIONS
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				| 1. | 
                                    The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of __________ of water. | 
                            
| A. | dissolved oxygen content | 
| B. | biological oxygen demand | 
| C. | vapor pressure | 
| D. | all (a), (b) and (c) | 
| Answer» B. biological oxygen demand | |