题目内容：
The scanning electron microscopy（SEM）uses a focused beam of high-energy electrons to generate a variety of signals at the inside of solid specimens.
A.正确
B.错误
参考答案：
选择题：The scanning electron microscopy（SEM）uses a focused beam of
- 题目分类：中国大学MOOC慕课
- 题目类型：选择题
- 号外号外：注册会员即送体验阅读点！