阿摩線上測驗
2. Down's syndrome is the most common genetic form of
intellectual disability, and ___ approximately one in 1,000 people.
(A) afflicts
(B) effects
(C) infects
(D) inflects
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統計： A(44), B(23), C(23), D(9), E(0) #1760462
統計： A(44), B(23), C(23), D(9), E(0) #1760462
