市政绩效管理信息系统的首要任务是( )
A.信息资料的收集 B.信息处理C.信息的反馈和沟通 D.信息监测
参考答案:A
下列水解反应的离子方程式正确的是( )
A.NH4++H2O⇌NH3•H2O+H+
B.S2-+H2O⇌H2S+2OH-
C.CH3COOH+H2O⇌CH3COO-+H+
D.CH3COOH+OH-⇌CH3COO-+H2O
---Hi, Jane. Are you free at six this evening? I was wondering if you could come with me to see the movie “X-men”.
---I’m sorry but I________it already. Besides, I________my mother do the laundry.
A.had seen; would be helping
B.saw; will help
C.have seen; would help
D.have seen; will be helping