50. 下列何者粉塵粒徑大小排列順序正確？
(A) Thoracic dust > Inhalable dust > Respirable dust
(B) Thoracic dust > Respirable dust > Inhalable dust
(C) Respirable dust > Inhalable dust > Thoracic dust
(D) Inhalable dust > Respirable dust > Thoracic dust
(E) Inhalable dust > Thoracic dust > Respirable dust
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