Which of the following statements is NOT true?
A) World population is increasing at a rate of 150 per minute.
B) Lower death rates also contribute to world population growth.
C) The population of Columbia has been doubling every year for 21 years.
D) The United States is usually doubling its population about every 87 years.
第1题:
已知有如下语句: s="hello, world" r=Mid(s,7,5) 运行上面的语句后,变量r的值为 ( )
A.hello
B.wotld
C.llo,w
D.orld
第2题:
第3题:
第4题:
下列字符型常量Hello,world!表示方法中,错误的是______。
A.[Hello,world!]
B.'Hello,wOrld!'
C.Hello,world!,
D.{Hello,world!}
第5题:
第6题:
13、Java程序向显示器输出信息“Hello, World”,下列哪种写法是错误的?
A.System.out.print(“Hello, world” );
B.System.out.println(“Hello, world” );
C.System.out.print(“Hello, world\n” );
D.printf(“Hello, world\n” );