题目内容
(请给出正确答案)
[主观题]
"An idea" as used in Line 5, refers to ______.A.a model of matterB.emission of electromagn
"An idea" as used in Line 5, refers to ______.
A.a model of matter
B.emission of electromagnetic radiation
C.quantums
D.the equation that described the distribution of radiation accurately over the range of low to high frequencies
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