Geologicaloceanographersuseechosounderto     thedepth  ...

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Geologicaloceanographersuseechosounderto     thedepth  ...

Geological oceanographers use echo sounder to      the depth    of the water.

       A.    figure up B.    figure in  C.    figure on D.    figure out

【回答】

C

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题型:选择题

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