Which of the following statement is NOT true of therapeutic cloning a. "Therapeutic" cloning is used mainly for research purposes and therefore should be allowed to continue. b. "Therapeutic" cloning is used for medical purposes and not for reproducing full human beings. c. "Therapeutic" cloning is used for replacing the diseased parts of human organs. d. Brain cell can be used in the future to cure the Parkinson’s disease.

喉咽部恶性肿瘤根据发生部位可位于()

A．梨状窝癌

B．会厌癌

C．环后癌

D．喉咽侧壁癌

E．喉咽后壁癌