单选题
These instruments are so powerful as to enable them to
ascertain
many facts of the deepest interest.
A. put out B. find out C. wear out D. turn out
A
B
C
D
【正确答案】
B
【答案解析】
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……
提交答案
关闭