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单项选择题

The term "oomph" ( Line 4, Paragraph 3 ) in the text denotes

A．clue.
B．short-cut.
C．insight.
D．energy.

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单项选择题The best title for this text could be

A．CEV and NASA' s lunar plan.
B．Frank Sietzen' s legendary affection.
C．CEV and its earth orbit.
D．Frank Sietzen' s astronomical feats.

单项选择题It is implied in the third paragraph that

A．lack of a 911 service will dim the prospect of internet telephony to some extent.
B．popular economic regulators are supportive of telecoms.
C．the technical ability is essential to many providers.
D．incumbent operators manage phone service fairly for the time being.