A-A+
In his research at Columbia University Charle
问题详情
In his research at Columbia University, Charles Townes worked with all of the following EXCEPT _________.
A．stimulated emission
B．microwaves
C．light amplification
D．a maser请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：C
解析：他在哥伦比亚大学(美)的调查中，查尔斯·汤尼斯用以下的工作，除了：A刺激性放射；B微波；C光扩大；D微波激射器。同样参考第②题不难看出，应该选C。
