单项选择题

According to （） across the relevant research community, the published attack represents an extreme position in its demands for proof.

A. soundings
B. echoes
C. sonar systems
D. reflections

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单项选择题

In a sense, scientists and engineers in the past have been fortunate, for we became accustomed to being measured by nature itself-- an unwaveringly fair and consistent, （） unforgiving, judge.

A. thus
B. nevertheless
C. therefore
D. albeit

单项选择题

Human choice, not the intrinsic content of science, determines the outcome and scientists, as human beings, therefore have a special responsibility to provide council rooted in（）.

A. expiration
B. explanation
C. expertise
D. expenditure

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