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
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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
单项选择题
The intellectually ______ enterprise of science depends on free communication.
A．depressing
B．depressed
C．exhilarating
D．exhilarated
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