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举一反三
【单选题】The writer of this passage refers to the history of money in order to ______.
A.
show that silver and gold are previous metals
B.
show that one should convert paper money to gold
C.
explain the nature of money
D.
show that anything can serve as money in modern times
【多选题】For the members of staff aboard a commercial aircraft, employed to ensure the safety and comfort of their passengers, we usually call them:
A.
cabin crew
B.
waitress
C.
crew member
D.
flight attendents
【单选题】The reservation agent a window seat for him on the flight.
A.
book
B.
reserving
C.
assigned
D.
safety
【单选题】The writer of this passage refers to the history of money in order to ______________.
A.
show that silver and gold are previous metals
B.
show that one should convert paper money to gold
C.
explain the nature of money
D.
show that anything can serve as money in modem times
【简答题】信息安全面临的主要威胁有哪些?
【单选题】Where were shells used as money in history? 查看材料
A.
In the Philippines.
B.
In China.
C.
In Africa.
D.
We don' t know.
【简答题】信息安全面临的主要威胁有哪些?
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