第5题: [单项选择]The aim of the voyages Maury was responsible for in the 1840 was ______. A. to make some sounding experiments in the oceans B. to collect sample of sea plants and animals C. to estimate the length of cable that was needed D. to measure the depths of the two oceans 参考答案:D 答案解析:该题对应了原文第四段话的第二句话,其中to investigate the depths是解题关键。