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445. Some ecosystems are more ______ than others, better able to withstand changes, while other ecosystems are more ______ and therefore susceptible to the slightest alteration.
A. resilient, vulnerable
B. stagnant, dependent
C. fragile, endangered
D. specialized, fluid
E. robust, ubiquitous
446. During decades of oppression, the people lost their will to resist and became ______ , yielding readily to the government's demands.
A. resolute
B. isolated
C. compliant
D. cunning
E. fervid
