5.That prompted the researchers to return in 1996 with equipment to drill a hole down to within a few feet of the water layer. At the bottom of this hole, researchers harvested specimens of algae and bacteria.

　　6.The researchers will return in 2004 equipped with instruments that are sterilized. They will then drill through the full 62 feet of ice and sample some of the briny water from the lake for analysis. The water specimen will be cultured to see if it contains life. Specimens from the water are expected to be even older than the life forms extracted from the ice covering.

　　练习：

　　1.Paragraph 2 _____

　　2.Paragraph 3 _____

　　3.Paragraph 4 _____

　　4.Paragraph 6 _____

　　A. Significance of Testing Techniques for Sampling Microbes in the Deep Ice Sheet

　　B. Special Features of Lake Vida

　　C. Later Expedition on Mars

　　D. 2004 Revisit Planned for Collecting Lake Water Specimens

　　E. Antarctic Frozen Life Sampled and Revived

　　F. Accidental Discovery of Ice-sealed Lake Water in Antarctica

　　5.Scientists ignored Lake Vida because they thought that a lake of ice _____.

　　6.Scientists expect that the life, if found in deeper water below the ice sheet, _____.

　　7.What the scientists will do in 2004 _____.

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