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【单选题】
工业上生产MnO 2 和Zn的主要反应有：①MnO 2 （矿石）+ZnS+2H 2 S 4 =MnSO 4 +ZnSO 4 +S+2H 2 O ②MnSO 4 +ZnSO 4 +2H 2 O 电解 . MnO 2 +Zn+2H 2 SO 4 下列说法正确的是（ ）A.
①中MnO 2 和H 2 SO 4 都是氧化剂
B.
①中析出32gS时转移1mol电子
C.
②中MnSO 4 发生氧化反应
D.
②中生成的Zn在阳极析出
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举一反三
【单选题】If an investor purchases a bond when its current yield is higher than the coupon rate, then the bond's price will be expected to:
A.
decline over time, reaching par value at maturity.
B.
increase over time, reaching par value at maturity.
C.
be less than the face value at maturity.
D.
exceed the face value at maturity.
【单选题】Which of the following are generally TRUE of bonds?
A.
A bond's return equals the yield to maturity when the time to maturity is the same as the holding period.
B.
A rise in interest rates is associated with a fall in bond prices, resulting in capital gains on bonds whose terms to maturity are longer than the holding periods.
C.
The longer a bond's maturity, the smaller is the size of the price change associated with an interest rate change.
D.
Prices and returns for short-term bonds are more volatile than those for longer-term bonds.
【判断题】A movement along the demand (or supply) curve occurs when the quantity demanded (or supplied) changes at each given price (or interest rate) of the bond in response to a change in some other factor be...
A.
正确
B.
错误
【单选题】The duration of a coupon bond increases
A.
the longer is the bond's term to maturity.
B.
when interest rates increase.
C.
the higher the coupon rate on the bond.
D.
the higher the bond price.
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