阿摩線上測驗
23. Most health plans must cover a set of _____ services — like shots and screening tests — at no cost to you.
(A) invasive
(B) emergent
(C) risky
(D) preventive
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統計： A(1), B(0), C(1), D(10), E(0) #3578092
統計： A(1), B(0), C(1), D(10), E(0) #3578092
