47. Contact dermatitis 是屬於哪一種 hypersensitivity reaction (A) type I (B) type II (C) type III (D) type IV

1. Malignant tumors are characterized by the following findings, except (A) Tumors remain localized, will not spread to other sites, and are amenable to local surgical removal (B) Tumors can invade and destroy adjacent structures and spread to distant sites (metastasize) to cause death (C) Lack of differentiation (D) Pleomorphism (E) Mitoses