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（6分）实验研究发现，硝酸发生氧化还原反应时，硝酸的浓度越稀，对应还原产物中氮元素的化合价越低。现有一定量的铝粉和的混合物与一定量很稀的硝酸充分反应，反应过程中无气体放出（N元素被还原为NH 4 + ）。在反应结束后的溶液中逐滴加入4mol/L NaOH溶液，所加的NaOH溶液的体积(mL)与产生沉淀的物质的量(mol)关系如下图所示。 （1）图中OC段没有沉淀生成,此阶段发生反应的离子方程式为： 。 （2）在DE段，沉淀的物质的量没有变化，则此阶段发生反应的离子方程式为 。上述现象说明溶液中 离子结合OH - 的能力最弱。 （3）B与A的差值为 mol。 （4）B对应的沉淀量为 mol，C对应的溶液体积为 mL。
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the face value of the bond plus an interest payment once the maturity date has been reached
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a fixed-interest payment every period and repays the face value at the maturity date
D.
the face value at the maturity date
E.
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the same amount every month until maturity date.
B.
a fixed interest payment every period and repays the face value at the maturity date.
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the face value of the bond plus an interest payment once the maturity date has been reached.
D.
the face value at the maturity date.
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20%的单元期望频数大于5
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20%的单元期望频数小于10
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20%的单元期望频数大于10
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【单选题】A coupon bond pays the owner of the bond
A.
a fixed interest payment every period, plus the face value of the bond at the maturity date.
B.
the face value of the bond plus an interest payment once the maturity date has been reached.
C.
the same amount every month until the maturity date.
D.
the face value at the maturity date.
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【判断题】定机器存在部分冷热量抵消,不是最节能的运行方法。
A.
正确
B.
错误
查看完整题目与答案
【单选题】coupon bond pays the owner of the bond
A.
A) the same amount every month until the maturity date.
B.
a fixed interest payment every period, plus the face value of the bond at the maturity date.
C.
the face value of the bond plus an interest payment once the maturity date has been reached.
D.
the face value at the maturity date.
E.
none of the above.
查看完整题目与答案
【单选题】A coupon bond pays the owner of the bond
A.
a fixed interest payment every period, plus the face value of the bond at the maturity date
B.
the face value of the bond plus an interest payment once the maturity date has been reached
C.
the same amount every month until the maturity date
D.
the face value at the maturity date
查看完整题目与答案
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【单选题】A coupon bond pays the owner of the bond _________
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【判断题】The owner of a bond or stock of a corporation is referred to as the investor.
A.
正确
B.
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查看完整题目与答案
【单选题】A coupon bond pays the owner of the bond
A.
a fixed interest payment every period, plus the face value of the bond at the maturity date.
B.
the face value of the bond plus an interest payment once the maturity date has been reached.
C.
the same amount every month until the maturity date.
D.
the face value at the maturity date.
E.
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查看完整题目与答案
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A.
正确
B.
错误
查看完整题目与答案
【单选题】What is Cristof Ruhl's basic attitude towards the renewable energy?
A.
Pessimistic and critical
B.
Supportive but with some reservation
C.
Optimistic and confident
D.
Indifferent
查看完整题目与答案
【判断题】定机器存在部分冷热量抵消,不是最节能的运行方法。
A.
正确
B.
错误
查看完整题目与答案
【单选题】coupon bond pays the owner of the bond
A.
A) the same amount every month until the maturity date.
B.
a fixed interest payment every period, plus the face value of the bond at the maturity date.
C.
the face value of the bond plus an interest payment once the maturity date has been reached.
D.
the face value at the maturity date.
E.
none of the above.
查看完整题目与答案
【单选题】A coupon bond pays the owner of the bond
A.
a fixed interest payment every period, plus the face value of the bond at the maturity date
B.
the face value of the bond plus an interest payment once the maturity date has been reached
C.
the same amount every month until the maturity date
D.
the face value at the maturity date
查看完整题目与答案