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【单选题】
如题图所示电路中,电源电动势 E 1 =E 2 =6V,内电阻不计,R 1 =R 2 =R 3 =3Ω,则 A、B两点间的电压是( )。A.
0
B.
-3V
C.
6V
D.
3V
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【单选题】I have only _____ uncle. His birthday is May _____ . [ ]
A.
one; one
B.
first; one
C.
one; first
D.
first; first
【单选题】The first three rows of the hall are ______ for special guests.
A.
preserved
B.
reserved
C.
conserved
D.
served
【简答题】The First of May is a Bank Holiday—the first public holiday of the year in England. Most people consider it a special day, the beginning of summer, a day when the light lasts long into the evening, an...
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