阿摩線上測驗
42. Why does the author mention “unique properties” of tree species?
(A)To explain why pests tend to target specific tree species
(B) To explain why pests can have long-term effects on entire ecosystems
(C) To explain how pests contribute to shifts in forest species composition
(D)To explain how pest are able to become established in an ecosystem
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統計： A(11), B(8), C(21), D(4), E(0) #3103914
統計： A(11), B(8), C(21), D(4), E(0) #3103914
