单项选择题An investigation that is ______ can occasionally yield new facts, even notable ones, but typically the appearance of such facts is the result of a search in a definite direction.
A．timely
B．unguided
C．consistent
D．subjective
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1.单项选择题According to legend, Daniel Webster made a ______ with Satan, but managed to talk his way out of it at the last moment.
A．economy
B．standard
C．van
D．compact
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