表达式’Hello world!’[-2]的值为()A、wB、dC、lD、r
表达式’Hello world!’[-2]的值为()
- A、w
- B、d
- C、l
- D、r
相关考题:
若要以标题2形式、红色显示Hello World文字,应该怎样编写?() A.〈font color="red" size="2"〉Hello World〈/font〉B.〈h2〉〈red〉Hello World〈/red〉〈/h2〉C.〈h2〉〈font color="red"〉Hello World〈/font〉〈/h2〉D.〈h2〉Hello World〈/h2〉
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!}
下列选项中,()是正确的表达式。 A、% String s = “hello world ” ;% B、% = “hello world ” ;% C、% = “hello world ” % D、% ! “hello world ” %
写“Hello World”的正确javascript语法是()A、document.write("Hello World")B、"Hello World"C、response.write("Hello World")D、("Hello World")
单选题如何在警告框中写入 "Hello World"?()AalertBox=Hello World BmsgBox(Hello World) Calert(Hello World) DalertBox(Hello World)
单选题Which SELECT statement will the result ‘ello World’ from the string ‘Hello World’?()ASELECT SUBSTR( ‘Hello World’,1) FROM dual;BSELECT INITCAP(TRIM (‘Hello World’, 1,1)) FROM dual;CSELECT LOWER(SUBSTR(‘Hello World’, 1, 1) FROM dual;DSELECT LOWER(SUBSTR(‘Hello World’, 2, 1) FROM dual;ESELECT LOWER(TRIM (‘H’ FROM ‘Hello World’)) FROM dual;
单选题下列选项中,()是正确的表达式。A% String s = “hello world ” ;% B% = “hello world ” ;% C% = “hello world ” % D% ! “hello world ” %