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【简答题】
水泥石的腐蚀主要包括软水腐蚀、（ ）类腐蚀、 酸类腐蚀和强碱类腐蚀四种。
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反馈参考答案：
举一反三
【单选题】In a fixed system，the government must______if there is a sudden demand for one currency to keep the system stable．
A.
sell enough of that currency into the market
B.
buy up that currency in the market
C.
discourage investment
D.
hold large reserves of that currency
【单选题】The longer the currency pass-through period, the ____ required for currency depreciation to have the intended effect on the trade balance.
A.
Shorter the time period
B.
Longer the time period
C.
Larger the spending cut
D.
Smaller the spending cut
【单选题】—How are you today? —Oh, I __________ as ill as I do now for a long time．
A.
didn’t feel
B.
haven’t felt
C.
wasn’t feeling
D.
don’t feel
【单选题】How often does the bus circle the city?
A.
an hour
B.
two hours
C.
three hours
D.
once a week
【单选题】In the case of an appreciating domestic currency, central banks often sell foreign currencies in exchange for domestic currency to stop the appreciation.
A.
TRUE
B.
FALSE
【简答题】According to the passage, how often does the card holder receive from the bank a statement describing the purchase record?
【单选题】The shorter the currency pass-through period, the ____ required for currency depreciation to have the intended effect on the trade balance.
A.
Shorter the time period
B.
Longer the time period
C.
Larger the spending cut
D.
Smaller the spending cut
【单选题】How often does the man get the newspaper?
A.
Every day.
B.
Every week.
C.
Every month.
【单选题】—Do you have a small mouth? —No, I don’t. I have a ____ one.
A.
long
B.
big
C.
wide
D.
short
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