问题
国际辐射单位和测量委员会简称（)
A.IGRU
B.ICRP
C.ISO
D.IBSS
E.AEC
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
