You are supposed to write a composition of about 400 words on this issue. In the first part of your composition, you should present your thesis statement; in the second part, you should support the thesis statement with details; and in the last part, you should bring what you have written to a natural conclusion.
Marks will be awarded for content, organization, grammar and diction. Please write you response on the answer sheet.

关于核医学分类的叙述，错误的是

A．核医学分为临床核医学与实验核医学

B．外照射治疗是目前核医学最常用方法

C．脏器功能测定属核医学诊断

D．内照射治疗属治疗核医学

E．脏器显像属核医学诊断