以下哪个JSON格式是正确的:
A: {"test":"hello"}
B: ["test":"hello"]
C: {"test":"hello":"world"}
D: {"test"}
A: {"test":"hello"}
B: ["test":"hello"]
C: {"test":"hello":"world"}
D: {"test"}
举一反三
- 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
- 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
- 下面的程序执行后,文件test中的内容是()。voidfun(char*fnam...n("test","hello,");}