题目内容：
举例说明什么是直接测量及这种测量有何特点。
参考答案：【答案仅供学习，请勿对照自行用药等】
选择题：举例说明什么是直接测量及这种测量有何特点。
- 题目分类：电气测量技术
- 题目类型：选择题
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