不能产生氢气的是[ ]
A.锌与稀H2SO4
B.Al与稀HNO3
C.铁与稀HCl
D.锌与浓HCl
答案:B
下列离子方程式中,书写正确的是( )
A.AlCl3溶液中加入足量的氨水:Al3+ + 3OH- = Al(OH)3↓
B.往碳酸钙中滴加稀盐酸:CO32-+2H+=CO2↑+H2O
C.Na与硫酸铜溶液反应: 2Na+Cu2+="Cu+" 2Na+
D.用小苏打治疗胃酸过多:HCO3-+H+=CO2↑+H2O
()is the process of obtaining the stakeholders’ formal acceptance of the completed project scope. Verifying the scope includes reviewing deliverables and work results to ensure that all were completed satisfactorily.
A.Project acceptance
B.Scope verification
C.Scope definition
D.WBS Creation