2. 外语
  3. These instruments are so powerful as to enable them to ascertain many facts of the deepest interest.

These instruments are so powerful as to enable them to ascertain many facts of the deepest interest.

admin2012-06-26  27
问题 These instruments are so powerful as to enable them to ascertain many facts of the deepest interest.
选项 A、put out
B、find out
C、wear out
D、turn out
答案B
解析 ascertain：查明；put out：扑灭，伸出；find out：了解，搞清楚，查明(经常接疑问词引导的从句，多数情况下不能与find替换。其意义并非强调结果)；wear out：使……筋疲力尽，穿坏；turn out：后来发现是……，被证明是……
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