单项选择题

A．Frustration.
B．Joy.
C．Excitement.
D．Sorrow.
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单项选择题
Basic research is vital because _______.
A．it leads to results that can be appreciated
B．it is driven out by applied research
C．it provides the Basis for scientific progress
D．its results cannot be anticipated
单项选择题
The 140 billion yuan earmarked will spend on upgrading to existing infrastructure.
A．Y
B．N
C．NG
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