下列变化需要加入氧化剂才能实现的是 [ ]
A.NaOH→NaCl
B.H2SO4→H2
C.HCl→Cl2
D.CaCO3→CO2
答案:C
—I thought I had made a good preparation.
—You are dreaming. The fact is that you at the beginning.[ ]
A. failed
B. are failing
C. have failed
D. fail
根据摊余成本的定义,下列各项中影响持有至到期投资摊余成本的有()。
A.债券投资的公允价值发生暂时性的变动
B.债券投资的票面利率
C.债券投资的实际利率
D.债券投资发生的减值损失
E.债券投资的溢折价