‌以下程序的输出结果是：( )‏‌fo = open("text.txt",'w+')‏‌x,y ='this is a test','hello'‏‌fo.write('{}+{}\n'.format(x,y))‏‌print(fo.read())‏‌fo.close()‏‌‏ A: this is a test hello B: this is a test C: this is a test,hello. D: this is a test+hello

以下哪个JSON格式是正确的: A: {"test":"hello"} B: ["test":"hello"] C: {"test":"hello":"world"} D: {"test"}

以下操作能实现追加写入文件的是 A: echo "hello" > /tmp/test B: echo "hello" >> /tmp/test C: print "hello\n" >> /tmp/test D: printf "hello\n" >> /tmp/test

下面的程序执行后,文件test中的内容是()。voidfun(char*fnam...n("test","hello,");}

以下操作能实现追加写入文件的是 A: echo "hello" > /tmp/test B: echo "hello" >> /tmp/test C: print "hello " >> /tmp/test D: printf "hello " >> /tmp/test

class Test { public static void main(String[] args) { StringBuffer sb = new StringBuffer("hello world"); sb.delete(6,sb.length()); System.out.println( sb.toString() ); } } A: Hello w B: Hello C: Hello worl

下列不合法的标识符是? A: _566 B: Hello Word C: man399 D: test$

请阅读下面的程序 class Test { private static String name; static { name = "World"; System.out.print (name); } public static void main(String[] args) { System.out.print("Hello"); Test test = new Test(); } } 下列选项中,程序运行结果是

class Test { public static void main(String[] args) { StringBuffer sb = new StringBuffer("hello world"); sb.replace(6, sb.length(), "java"); System.out.println( sb.toString() ); } } 选择正确的运行结果 A: hello javad B: hellojava C: hello java

写出以下程序的执行结果为（         ）function test() {console.log(a);var a = 1;console.log(a);console.log(hello)}tset();