阿摩線上測驗
40. What is this passage mainly about?
(A) A new design in lighting.
(B) Wireless transmission through illumination.
(C) Radio interference in public areas.
(D) Potential applications of Li-Fi for military use.
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統計： A(22), B(89), C(5), D(15), E(0) #1838149
統計： A(22), B(89), C(5), D(15), E(0) #1838149
