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【单选题】
With apples at 25 cents a pound, we couldn t resist______four pounds.A.
to take
B.
took
C.
taking
D.
have taken
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【单选题】There is no _________ available for this flight. You have to pay a full fare.
A.
discount
B.
penalty
C.
surcharge
D.
imbursement
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A.
PNP型硅管
B.
PNP型锗管
C.
NPN型锗管
D.
NPN型硅管
【简答题】Waitress: How is your meal, sir? Guest: _______________________. Waitress: Thank you._______ _______________________? Guest: Yes. Waitress: ____________________.(offering the bill) The total is 70RMB....
【简答题】This contract is made in duplicate and each party shall keep one copy.This contract shall come into force after the signature by the authorized representatives of both parties.
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【单选题】三极管工作在放大区,三个电极的电位分别是6V、12V和6.7V,则此三极管是( )。(发射结正偏、集电结反偏)
A.
PNP型硅管
B.
PNP型锗管
C.
NPN型锗管
D.
NPN型硅管