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【简答题】
测得某晶体管的各极电流如下图所示。请判断说出该晶体管是( )型(填NPN或PN型),直流放大倍数β=( )。
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举一反三
【单选题】The General Manager held a dinner party at the International Hotel _______ the foreign guests.
A.
in honor of
B.
in place of
C.
in face of
D.
in favor of
【单选题】The MARPOL Convention is the main international convention .
A.
about marine pollution prevention
B.
covering marine protection of life
C.
about marine
D.
about ship and port security
【单选题】The foreign guests liked the children and their shows ________they saw in the kindergarten.
A.
what
B.
who
C.
which
D.
that
【单选题】The foreign guests who paid a visit to our city last week are greatly impressed by the fact that_______ people from all walks of life are working hard for_______ new Haimen.
A.
不填; a
B.
不填；the
C.
the；a
D.
the； the
【单选题】I told the foreign guests that it was in the house ______ we used to live that the exhibition was held.
A.
that
B.
which
C.
where
D.
there
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