逻辑表达式(a>b || b==5)的相反表达式为 (a>b && b==5)。()

In the 1950s and 1960s in an Irish family there were 2 or 3 children on average.() 点击查看答案

John Steven, an American entrepreneur in the late 19th century, was the first to use assembly line for manufacturing cars.() 点击查看答案