Many of the soundings shown on the chart are derived from ______.Undue reliance should not

题目

Many of the soundings shown on the chart are derived from ______.Undue reliance should not be placed upon them.

A.complete and often very poor surveys

B.correct and often very good surveys

C.inadequate and often very old surveys

D.adequate and present surveys

参考答案和解析
正确答案:C
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