【简答题】Modern technology has a big influence on our daily life. New devices are widely used today. For example, we have to 20 the Internet everyday. It is becoming more and more 2 1 to nearly everybody. Now ...
【单选题】(接着上题))为了分辨第二级钠光谱的双线(589nm、589.6nm),长度为375px的平面光栅常量应为多少?
【简答题】若有枚举类型定义:enum color {red, orange=3, yellow, green, blue},则green的值为______。
【简答题】The Internet has helped to connect and bring the entire world together. As a result, people now use the Internet to choose services, products and websites that come on the 1st or 2nd page of Google. T...