问题
1,2,2,3,4，（) A.4 B.5 C.6 D.7
1,2,2,3,4，()
A.4
B.5
C.6
D.7
请帮忙给出正确答案和分析，谢谢！
Fatal error: Uncaught [XSException] ../../../usr/local/xunsearch/sdk/php/lib/XS.php(2559): Connection refused(C#111, localhost:8384)
thrown in /usr/local/xunsearch/sdk/php/lib/XS.php on line 2559
