问题 单项选择题

商品流通企业决策支持子系统(DSS)所使用的信息具有的特征是()。

A.精度高 

B.高度统计和概括 

C.时效性强 

D.只能来自于企业内部

答案

参考答案:C

解析:子系统所使用的信息具有高度统计和概括的特征,并需要大量的外部信息供其参考,产生的决策信息是综合了以上各类信息资源和功能的结果,决策的正确性要由实践检验,并将检验的结果(无论成败)充实到DSS系统中,使其成为DSS系统新的资源。

阅读理解

阅读,选择正确答案。

      There are four seasons in China. March, April and May make the spring. June, July and August make the

summer season. September, October and November make the autumn season. The rest (剩下) of months make

the winter season. The Australia seasons are the opposite (相反的) of ours. When it's spring in China, it is

autumn in Australia. Australia is in the south of the earth. June, July and August are the winter months. The

summer is in December, January and February. It's very hot there, too. Near the North Pole (北极) there are

two seasons. The winter nights are long. For more than two months you can't see the sun, even at noon. The

summer days are long. For more than two months, the sun never sets (落下), and there's no night.

1. ___________ make the winter season in China.[ ]

A. October, November and December

B. November, December and January

C. December, January and February

D. January, February and March

2. When it's summer in China, it is ___________ in Australia.[ ]

A. winter

B. autumn

C. spring

D. summer

3. Near the North Pole there are two seasons: ___________.

A. spring and summer

B. summer and winter

C. summer and autumn

D. spring and winter

4. Near the North Pole, there's no night in summer for more than ___________ months.[ ]

A. one

B. two

C. three

D. four

5. ___________ in winter near the North Pole.[ ]

A. The days are longer than the nights

B. The days are as long as the nights

C. The days are shorter than the nights

D. The nights are shorter than the days

单项选择题