题目内容：
使多样性维持高水平的措施是（ ）
A．保持平静 B．强度干扰
C．中度干扰
D．低度干扰
参考答案：
答案解析：
单选题：使多样性维持高水平的措施是（ ）
- 题目分类：生态学基础
- 题目类型：单选题
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B．强度干扰
C．中度干扰
D．低度干扰
B．强度干扰
C．中度干扰
D．低度干扰
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患儿，男，5个月，出生时即被家属发现，右颊部有稍红斑片，哭闹时颜色加重，逐渐增大，大小约2.0cm×1.5cm，稍高于皮肤，目前的治疗方法首选（ ）A．硬化剂
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