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
The policy was technology transfer, embodied in the innovation chain with its three great links—invention, innovation, and______.
A．diffusion
B．diffidence
C．indifference
D．indigence
单项选择题
This scenario is either a huge hoax ______ the American people or will require extreme reductions in discretionary spending including funding for science programs.
A．persevered in
B．persisted in
C．perpetuated on
D．permeated through
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