甲乙两个互斥方案的现金流量见下表，则增量投资收益率为( )。

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问题单项选择题

A．年

B．0

C．1

D．2

E．3

F．4

G．5

H．6

I．7

J．8

K．甲的现金流量（万元）

L．-1000

M．230

N．280

O．340

P．420

Q．450

R．450

S．450

T．480

U．乙的现金流量（万元）

V．-800

W．200

X．250

Y．310

Z．390

Z．420

Z．450

答案

参考答案：C

问答题

Cathy and Dube are estate agents, who decide to conduct business jointly. They came to the following oral agreement:(a) Cathy will provide R10,000 that is needed to carry on the business. Half of this amount will be refunded to Cathy, together with interest, after a period of two years.(b) Dube will be responsible for all the administrative work, and he will not have the authority to enter into any contract without Cathy’s consent.(c) Cathy will be entitled to the first R25,000 of the annual profit, and all profits thereafter will be divided equally between Cathy and Dube.Required:Advise Cathy and Dube whether the agreement constitutes a partnership. (10 marks)

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单项选择题

以下关于switch技术的叙述中不正确的是（）

A.GBIC是一种通用的、低成本的千兆位以太网堆叠模块，用于提供与其他交换机和服务器的千兆位连接

B.switch堆叠时，必须使用专用堆叠电缆并通过交换机的uplink端口进行连接

C.所谓“背板带宽”，是指switch背板总线或交换矩阵的总吞吐能力

D.所谓“VLAN”，是指借助于switch将一个物理网络划分成若干个较小的逻辑广播域

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