单项选择题

DETRITUS:

A． aged thing
B． commonplace subject
C． awkward substance
D． unique relic
E． precious matter
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单项选择题
DEFT:
A． dilapidated
B． ungainly
C． rational
D． adjacent
E． serene
单项选择题
The passage is primarily concerned with
A． describing an important technique
B． discussing a new method
C． investigating a controversial procedure
D． announcing a significant discovery
E． promoting a novel application
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