单项选择题

The decision will give renewed ______ to the economic regeneration of backward regions.

A．index
B．impulse
C．impact
D．impetus
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单项选择题
New vehicles must ______ with certain standards for environmental protection.
A．apply
B．comply
C．imply
D．supply
单项选择题
The disagreement over the trade restrictions could seriously ______ relations between the two countries.
A．tumble
B．manipulate
C．jeopardize
D．intimidate
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