After the second world war, the United States became the sole superpower in the world_____

执行下列语句后的显示结果是（ ）world="world"print("hello"+world) A: helloword B: "hello"world C: hello world D: "hello"+world

如何使用 PHP 输出 "hello world"？( ) A: "Hello World"; B: echo "Hello World"; C: Document.Write("Hello World"); D: console.log("Hello World");

执行下列语句后的显示结果是什么? >>> world=”world” >>> print( “hello”+ world) A: helloworld B: “hello”world C: hello world

______thisway,oneof_____thefavoritedrinkswasinvented. A: In;world’s B: By;world’sCOn!WorldD,To;world

Without electricity, what ______ A: will the world be like B: would the world be like C: the world will be like D: the world be like

下面代码的运行结果是（ ）。var str= "hello world" ;var str1=str.toUpperCase();var str2=str.toLowerCase() ;alert (str1) ;alert (str2) ; A: "HELLO WORLD","HELLO WORLD" B: "HELLO WORLD","hello world" C: "hello worl","HELLO WORLD" D: "hello world","hello world"

hello world='hello world'

print("hello"+"world")的输出结果是。 A: “hello”world B: hello world C: "hello"+world D: helloworld

如何使用 PHP 输出 "hello world"?( ) A: "Hello World"; B: echo "Hello World"; C: Document.Write("Hello World");