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【单选题】
According to Dyfan Jones what has changed isA.
people’s mentality.
B.
pop culture.
C.
town’s appearance.
D.
possibilities for the people.
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举一反三
【单选题】某三相异步电动机，额定电压和电流分别为380V、100A，额定效率为0.85，额定功率因数为0.8，则该电机的额定输入功率为（ ）。
A.
38kW
B.
52.7kW
C.
55.9kW
D.
65.8kW
【简答题】passage 4-3
【单选题】电机和负载最好匹配运行,尽量不“大马拉小车”;如果某三相异步电动机额定功率因数为0.85,则轻载运行时功率因数可能是_____。( )
A.
0.9
B.
0.85
C.
0.87
D.
0.4
【简答题】passage 4-3
【单选题】The air quality in the city, _____ is shown in the report, has improved over the past two months.
A.
that
B.
it
C.
what
D.
as
【单选题】The air quality in the city, ____ is shown in the report, has improved over the past two months.
A.
that
B.
which
C.
as
D.
what
【简答题】passage4-3
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