2. 考研
  3. Through the method of echo sounding, oceanographers can ________ the depth of the ocean at a specific site in a matter of second

Through the method of echo sounding, oceanographers can ________ the depth of the ocean at a specific site in a matter of second

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问题 Through the method of echo sounding, oceanographers can ________ the depth of the ocean at a specific site in a matter of seconds.
选项 A、span
B、navigate
C、designate
D、ascertain
答案D
解析 本题考查动词词义辨析。span意为“持续、贯穿，包括(广大地区)”；navigate意为“导航，确定(船、汽车、飞机等)位置”；designate意为“命名，指定、委派(某人任某职)”； ascertain意为“查明、弄清”。根据method of echo sounding(回声测深法)和the depth of the ocean (海洋的深度)可知，海洋学家要做的是确定水深，故答案为D项。
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