問題詳情
436.Spreading of bird flu viruses is much more likely caused by both legal and illegal poultry trades than _____ through wild bird migrations.
(A) dispersing
(B) contracting
(C) soaring
(D) injecting
參考答案
答案：A
難度：適中0.5
統計：A(10),B(2),C(3),D(3),E(0)
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