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Title: A water quality expert checked the level of dissolved oxygen in lake water and found it ________. Post by: Nimaa on Feb 14, 2015 A water quality expert checked the level of dissolved oxygen in lake water and found it ________.
A) was within normal limits for an unpolluted lake B) was much higher than normal C) was low- normal on the surface but extremely low near the bottom sediments D) very low at the surface and normal near the bottom sediments E) absent entirely Title: Re: A water quality expert checked the level of dissolved oxygen in lake water and found it ________ Post by: JesuisMel on Mar 2, 2015 Content hidden
Title: Re: A water quality expert checked the level of dissolved oxygen in lake water and found it ________. Post by: Nimaa on Mar 3, 2015 Marking this topic solved, solid help.
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