单项选择题

After several nuclear disasters, a _________ has raged over the safety of nuclear energy.

A．quarrel
B．suspicion
C．verdict
D．controversy
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单项选择题
The _________ cycle of life and death is a subject of interest to scientists and philosophers alike.
A．incompatible
B．exceeding
C．instantaneous
D．eternal
单项选择题
For many patients, institutional care is the most _________ beneficial form of care.
A．pertinent
B．appropriate
C．acute
D．persistent
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