2. 外语
  3. They are sure they have all the facts they need to ______ the existence of a black hole.

They are sure they have all the facts they need to ______ the existence of a black hole.

admin2010-04-24  24
问题 They are sure they have all the facts they need to ______ the existence of a black hole.
选项 A、obtain
B、maintain
C、verify
D、display
答案C
解析 C verify意为“核实，查证”，符合题意，故为答案。而其他三个选项与上下文意思不符，故排除。
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