单项选择题

NCSA aims to develop（）

A．a new Internet browser.
B．a more powerful national system.
C．human-computer intelligence interaction.
D．a new global network.

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单项选择题
Today's computers can process data （） times faster than the 1952 model, ILLIAC.

A．4
B．100
C．200
D．4,000
单项选择题
The writer of this letter attempts to （）the views in the editorial.

A．refute
B．illustrate
C．support
D．substantiate
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