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【单选题】
下列表示离散趋势的指标中, ( )没有单位(量纲)。A.
标准差
B.
极差
C.
变异系数
D.
四分位数间距
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皮皮学刷刷变学霸
举一反三
【单选题】● Free float is the amount of time that an activity may be delayed with out affecting the _____.
A.
Early start of the succeeding activities.
B.
Late start of the succeeding activities.
C.
Project finish.
D.
Cost of the project.
E.
None of the above.
【单选题】----You _______ part in the party in time. ----Sorry I was delayed by the accident.
A.
are supposed to take
B.
have supposed to take
C.
are supposed to have taken
D.
supposed to take
【简答题】—What caused the party to be put off? —__________ the invitations. A．Tom delayed sending B．Tom’s delaying sending C．Tom delaying to send D．Tom delayed to send
【单选题】Time delayed or delayed action-type fuses are designed to_____
A.
prevent opens in motor circuits
B.
guard lighting and electronic circuits
C.
prevent grounds in branch circuits
D.
permit momentary overloads without melting
【简答题】Claim on delayed shipment is that sellers fail to make the delivery according to time schedule.
【单选题】Time delayed or delayed action-type fuses are designed to _____.
A.
prevent grounds in branch circuits
B.
prevent opens in motor circuits
C.
permit momentary overloads without melting
D.
guard lighting and electronic circuits
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