问题
4, 4, 6, 12, () A.30 B.24 C.20 D.18
4, 4, 6, 12, ()
A.30 B.24 C.20 D.18
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