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【单选题】
釉质中无机物约占总重量的A.
70%
B.
50%
C.
96%~97%
D.
86%
E.
75%
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举一反三
【单选题】听力原文：In the United States, the Federal Gold Reserve acts as the central bank. (2)
A.
In the US, the Federal Gold Reserve acts as the central bank.
B.
In the US, the central bank is the commercial bank.
C.
In the US, there is no central bank.
D.
In the US, the central bank is not so important.
【单选题】It's first time that he has been to the United States, ______?
A.
isn't he
B.
isn't it
C.
hasn't he
D.
hasn't it
【单选题】Who are the first to bear financial losses incurred by the bank?______.
A.
The depositors
B.
The debtors
C.
The bank capital shareholders
D.
The bank employees
【简答题】积土成山,();积水成渊,();而积善成德,()。
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