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【多选题】
【2015-73】某工程按月编制的成本计划如下图所示,若6月、7月实际完成的成本为700万元和1000万元,其余月份的实际成本与计划相同,则关于成本偏差的说法,正确的有( )。A.
第7个月末的计划成本累计值为3500万元
B.
第6个月末的实际成本累计值为2550万元
C.
第6个月末的计划成本累计值为2650万元
D.
若绘制S型曲线，全部工作必须按照最早开工时间计算
E.
第7个月末的实际成本累计值为3550万元
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【单选题】Which statement is true?
A.
Internet can’ t open markets that were previously closed
B.
Whether e-commerce promote international trade will depend on the nature of good
C.
The significance of geographic proximity and traditional business networks can’ t be reduced
D.
Trade can’ t effect internet use
【单选题】Which statement is false ?
A.
The fish was hooked in the noon, but the old man hasn ’ t seen it until the night.
B.
The old man had spent the whole night on the sea without knowing what kind of fish being hooked it was.
C.
The old man has no sense of loneness since he believed that a man can never be alone on the sea.
D.
Something was wrong with the old man ’ s hands.
【单选题】which of the statement about t distribution is wrong?
A.
the t distribution is a family of curves
B.
the distribution is unimodal distribution
C.
center on 0, left and right symmetry
D.
the t distribution only have a curve
E.
when ν= ，t distribution approximates z/u distribution
【判断题】分型面选择时为便于侧分型和抽芯,若塑件有侧孔或侧凹时,宜将侧型芯设置在垂直开模方向上,除液压抽芯机构外,一般应将抽芯或分型距较大的放在开模方向上。
A.
正确
B.
错误
【单选题】Which statement about diesel engine combustion is true?
A.
Combustion does not begin until the piston starts down on the power stroke
B.
Maximum combustion pressure is reached before TDC
C.
Turbulence in the cylinder causes a delay in ignition
D.
Maximum cylinder firing pressure is not developed until the piston passes TDC
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