9. _________ tumors are cancerous and formed from abnormal cells.
(A) Indignant
(B) Alkaline
(C) Malignant
(D) Acid
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統計: A(18), B(11), C(459), D(5), E(0) #1801825
統計: A(18), B(11), C(459), D(5), E(0) #1801825