关于毛周角化的临床表现说法不正确的是
A. 皮损好发于皮脂溢出部位
B. 针尖至粟粒大坚硬毛囊性丘疹,互不融合
C. 丘疹顶端名有圆锥形角质栓,为毛囊上皮细胞及皮脂分泌物聚集于毛干周围形成
D. 病程慢性,有剧烈瘙痒
An expanation might be confusing or too vague if you don't consider the _____ and target _____.
_______ and an understanding of the academic language is required to express a notional meaning.
Which is not the common technique in explaining a notion?
A. definition
B. exemplification
C. analogy
D. concept