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【单选题】
Every one except Tom and John _____there when the meeting began.A.
is
B.
were
C.
was
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举一反三
【单选题】A common character of the things used for money was that they________.
A.
were difficult to get
B.
had some practical use
C.
were considered valuable by all people
【单选题】一台额定功率为50MW的发电机带一个40MW负荷运转,发电机的调差系数为4%,负荷的单位调节功率为1.5,那么系统的单位调节功率为( )。
A.
32.75
B.
29.75
C.
26.5
D.
23.5