【简答题】请将下面程序补充完整。 public class PowerCalc{ public static void main(String[]args){ double x=5.0; System. out. println(x+'to the power 4 is'+power(x, 4)); System. out. println('7. 5 to the power 5 is'+power(7....
【单选题】About 3 billion people live within 100 miles (160km) of the sea, a number that could double in the next decade as humans flock to coastal cities. The oceans produce $3 trillion of goods and services e...
【简答题】阅读理解。 What is red but green, open but closed and old but new? The answer is: London's new double-decker (双层) buses. Red double-deckers are a symbol of the city. Their status was sealed (确定) in 2008 wh...