(A) light form fluorescent tube (X)
(B) light form neon lamp (X)
(C) light form sodium lamp ()
(D) light form simple lamp (X)
Answers: light form sodium lamp
(A) light form fluorescent tube (X)
(B) light form neon lamp (X)
(C) light form sodium lamp ()
(D) light form simple lamp (X)
Answers: light form sodium lamp
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