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【单选题】
下面关于集线器与交换机的描述中,错误的是(40)。
A.
交换机是一种多端口网桥
B.
交换机的各个端口形成一个广播域
C.
集线器的所有端口组成一个冲突域
D.
集线器可以起到自动寻址的作用
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【单选题】If the effective bearing area has been reduced , remedial action should be taken.
A.
by more than 5 percent
B.
by less than 10 percent
C.
to 95 percent
D.
to less than 90 percent
【单选题】某投资者拟准备投资于一个投资额为20000元的A项目,项目期限4年,期望投资报酬率为10%,每年能获取现金流量7000元。则净现值为( )元。
A.
3000
B.
2189
C.
3500
D.
2500
【单选题】Regarding water availability in the infrastructure ___.
A.
more than 95 percent of the world’s population has running water
B.
many cities have old leaky pipes
C.
it is not important to economic development
D.
All of the above
【单选题】More than 95 percent of our students are either employed _________continuing their education six months after graduation.
A.
or
B.
and
C.
nor
D.
but
【简答题】Fill in the blanks with prepositions or adverbs to make up idioms, phrasal verbs and fixed expressions. 5. More than 2.3 million comments have been received by the Forest Service with_____________ of ...
【单选题】边界空间的最重要的特点是?,体现为边界空间隶属于两个或多个空间单元,无法进行精确的划分。
A.
公共性
B.
异质性
C.
模糊性
D.
中介性
【单选题】Claire’s seeks to appeal to young women by selling inexpensive jewelry, accessories, and ear piercings. Claire’s use of a ______ has been very successful; the firm has more than three thousand locatio...
A.
Differentiation focus
B.
Differentiation
C.
Cost focus
D.
Cost leadership
【单选题】某投资者拟准备投资于一个投资额为20000元的A项目,项目期限4年,期望投资报酬率为10%,每年能获取现金流量7000元。则该项目净现值为( )元。
A.
2403
B.
2189
C.
2651
D.
2500
【简答题】已经漂白加工的羽毛
【单选题】Which of the following, if true, would most weaken the argument of the critics of the Kyoto Protocol that implementing the protocol would be too costly?
A.
While it is true that the scientific community is not unanimously in agreement that global warming is occurring, more than 95 percent of climatologists at universities and government-funded laboratories in Europe and North America agree that global warmin
B.
Hybrid fuel-cell cars are less expensive to operate than conventional cars because of their much greater fuel efficiency, but it is unlikely that these operational savings will ever be able to cost-justify the much greater initial investment required to p
C.
Nuclear power, although completely flee of carbon emissions and comparable in operating cost to an oil-burning power plant, brings the added back-end cost of disposing of the spent nuclear waste, which is both radioactive and highly toxic.
D.
Although it is unfair in a sense to impose different emissions restrictions on different countries, it is only fair to impose the most restrictive limitations on countries whose advanced economic development will allow them to conform. to the regulations w
E.
One nation that switched the fuel of 35 percent of its power plants from coal to natural gas in order to reduce carbon dioxide emissions found that natural gas, although initially more expensive than coal, dropped in price to a level comparable to that of
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