()
A.-2
B.-3
C.-4
D.-5
参考答案:D
解析:
[答案]D。解析:每行每列加起来的和都是5,则( )=5-4-6=-5。
China recently control its waters near the HuangYan Island to prevent Chinese fishing boats from ____in the South China Sea
A.attacking
B.having attacked
C.being attacked
D.having been attacked
较大质量事故由( )组织有关单位制定处理方案。
A.上级主管部门
B.省级水行政主管部门
C.流域机构
D.项目法人