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【单选题】
What should the tour guide do in an emergency?A.
Call your travel Service immediately in an emergency.
B.
Be fast and resourceful in an emergency.
C.
Make measure at once in an emergency.
D.
Be calm and resourceful to make measure s in an emergency.
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举一反三
【单选题】My mother and I went on a to Thailand to see my brother who is studying there.
A.
journey
B.
travel
C.
way
D.
trip
【简答题】● (71) In the strength of the carrier signal is varied to represent binary 1 or 0． (72) is a system that can map a name to an address and conversely an address to an name． (73) is a three-way handshak...
【单选题】In the strength of the carrier signal is varied to represent binary 1 or 0. (72) is a system that can map a name to an address and conversely an address to an name. (73) is a three-way handshaking aut...
A.
ASK
B.
PSK
C.
FSK
D.
FDM
【简答题】A．some B．several C．various D．varied
【简答题】［A］ alternate ［B］ different ［C］ varied ［D］ several
【简答题】The coral islands have varied _________________________________________________________.
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