The passage is chiefly about ______. It can be inferred from the passage that ______.

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问题 The passage is chiefly about ______.
It can be inferred from the passage that ______.

选项 A、new radio devices should be developed for tracking the endangered blue whales
B、blue whales are no longer endangered with the use of the new listening system
C、opinions differ as to whether civilian scientists should be allowed to use military technology
D、military technology has great potential in civilian use

答案D

解析 依据为第三段第一行和第五段的相关内容。
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