在投资方案评价中,投资回收期只能作为辅助评价指标的主要原因是( )。 A.忽视资金

题型:单项选择题

问题:

在投资方案评价中,投资回收期只能作为辅助评价指标的主要原因是( )。

A.忽视资金具有时间价值的重要性,在回收期内未能考虑投资收益的时间点
B.只考虑投资回收前的效果,不能确定放映投资方案在整个计算期内的经济效果
C.只考虑投资回收的时间点,不能系统放映投资回收之前的现金流量
D.基准投资回收期的确定比较困难,从而使方案选择的评价准则不可靠

考点:一级建造师建设工程经济建设工程经济
题型:单项选择题
已知椭圆C 1
x2
a2
+
y2
b2
=λ1
(a>b>0,λ1>0)和双曲线C 2
x2
m2
-
y2
n2
=λ2(λ2≠0)
,给出下列命题:
①对于任意的正实数λ1,曲线C1都有相同的焦点;
②对于任意的正实数λ1,曲线C1都有相同的离心率;
③对于任意的非零实数λ2,曲线C2都有相同的渐近线;
④对于任意的非零实数λ2,曲线C2都有相同的离心率.
其中正确的为(  )
A.①③B.①④C.②③D.②④
题型:单项选择题

如图所示,单匝线圈ABCD在外力作用下以速度V向右匀速进入匀强磁场,第二次又以速度2V匀速进入同一匀强磁场.则下说法说正确的是(  )

A.第二次与第一次通过AB边横截面的电荷量之比为2:1
B.第二次与第一次线圈中产生的热量之比为4:1
C.第二次与第一次线圈中最大电流之比为2:1

题型:单项选择题

Big Cheese Chairs (BCC) manufactures and sells executive leather chairs. They are considering a new design of massaging chair to launch into the competitive market in which they operate.They have carried out an investigation in the market and using a target costing system have targeted a competitive selling price of $120 for the chair. BCC wants a margin on selling price of 20% (ignoring any overheads).The frame and massage mechanism will be bought in for $51 per chair and BCC will upholster it in leather and assemble it ready for despatch.Leather costs $10 per metre and two metres are needed for a complete chair although 20% of all leather is wasted in the upholstery process.The upholstery and assembly process will be subject to a learning effect as the workers get used to the new design. BCC estimates that the first chair will take two hours to prepare but this will be subject to a learning rate (LR) of 95%. The learning improvement will stop once 128 chairs have been made and the time for the 128th chair will be the time for all subsequent chairs. The cost of labour is $15 per hour.The learning formula is shown on the formula sheet and at the 95% learning rate the value of b is –0·074000581.Required:

(b) Assuming that a cost gap for the chair exists suggest four ways in which it could be closed. (6 marks)The production manager denies any claims that a cost gap exists and has stated that the cost of the 128th chair will be low enough to yield the required margin.

题型:单项选择题

子嗽的发生主要责之于()

A.脾胃

B.心肝

C.肺脾

D.肺肾

E.肝肾

题型:单项选择题

根据物料的干燥速率变化,可分为恒速阶段和降速阶段,在降速阶段的干燥速率取决于

A.水分在物料内部的迁移速度

B.物料表面水分的气化速率

C.空气温度与物料表面的温度差

D.空气流速和空气温度

E.平衡水分和自由水分

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