()是指横波入射时使同介质中的纵波反射角等于90°时的横波入射角及在同介质中的纵波全反射。
A、第三临界角
B、第一临界角
C、第二临界角
D、半扩散角
参考答案:A
The prototyping method is a dynamic design process, which requires people who use prototyping method to have the following capability of
A.proficient program expertise
B.immediately acquire requirement
C.coordinate & organize eloquently
D.handle tools smartly
华罗庚是一个传奇式的人物,是一个自学成才的什么学家?