单项选择题

An energy tax would curb ordinary air pollution, limit oil imports and cut the budget ______

A．disposition
B．discrepancy
C．defect
D．deficit
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单项选择题
A．wayB．caseC．eventD．manner
A．way
B．case
C．event
D．manner
单项选择题
Many types of rock are ______ from volcanoes as solid, fragmentary material.
A．ejected
B．injected
C．propelled
D．flung
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