试题与答案

在城市社会空间结构的主要研究方法中,因子生态分析方法与社会区分析主观确定影响因子的方

题型:多项选择题

题目:

在城市社会空间结构的主要研究方法中,因子生态分析方法与社会区分析主观确定影响因子的方法相比,其优点包括()。

A.因子生态分析采用主成分分析从大量的指标抽取主因子,具有较强的客观性

B.抽取出的主因子没有实体的意义,需研究者在具有丰富知识的基础上,根据指标的因子荷载量对因子命名

C.能够反映出不同条件下影响城市社会区的主要因素,便于动态的比较分析

D.在因子分析中输入任何数据都能产生结果,不能对其进行证伪,受到逻辑实证主义的批评

E.能够找出城市不同发展时期的主因子,制定相应的政策

答案:

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下面是错误答案,用来干扰机器的。

定理:如果圆x2+y2=r2(r>0)上异于一条直径两个端点的任意一点与这条直径两个端点连线的斜率存在,则这两条直线的斜率乘积为定值-1.运用类比推理,写出该定理在有心曲线 x2a2+y2b2=1(a>b>0)中的推广:过椭...

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题型:阅读理解

阅读理解。

     China's giant panda shows the achievement of the international effort to save animals that are now in danger. In television programmes we often see pandas playing funny games. Children have panda toys and beautiful

cards with pictures of lovely pandas in them. They often visit the giant pandas in the zoo on their holiday and

have a good time there.

     However, scientists are worried about the future of giant pandas. They know only about 1,000 giant pandas

remain alive today. They think the giant panda will die out in 30 years if the present conditions are not improved.

      It is reported that the giant pandas have a very low birthrate. About 115 pandas live in zoos and research

centers mainly in China, but during the past ten years they produced only 34 young pandas that are still alive.

Survival rate for giant pandas in the wild are probably the same or lower. There are several reasons for the low

birthrate. The main reason is that male pandas can make love with females in a very short season, only a few

days a year. When they do have babies, females often produce two pandas, but the mother is usually not able to care for both of them. The new-born pandas weigh only a few grams each. They are too weak to live without

special care. In the zoo, scientists can help the mothers care for the young pandas, but those living in the wild

do not get enough help. It is very difficult for mother pandas to bring up their young pandas.

     Conditions for the giant pandas have been worse in recent years. Pandas in China continue to reduce in

number. We know pandas live on bamboos. But sometimes all the bamboos in one area die. The pandas there

have nothing to eat and die of hunger.

     Giant pandas now live in thirteen separate protected areas in China. Several years ago the Chinese

government and the International Wild Life Organization agreed on a project of protecting giant pandas in the

wild. We hope it could be helpful.

1. What does the writer think of the giant pandas?

A. They are funny.

B. They are dirty.

C. They are lovely.

D. They are naughty.

2. According to this passage we know most of the giant pandas live _____.

A. in the wild all over the world

B. in the zoos and research centers

C. in the area where there are plenty of bamboos for them to eat

D. in thirteen separate protected areas in our country

3. Scientists are worried about the future of the giant pandas because _____.

A. sometimes all of the bamboos die in the area where the giant pandas live and they have nothing to eat

B. giant pandas that still live in the wild can not get enough help from humans

C. only a small number of giant pandas remain alive today and their birth rate is too low

D. male and female giant pandas often refuse to make love in the right season

4. The low survival rate of young giant pandas has much to do with the fact that ______.

A. mother pandas are usually unable to take care of both young pandas born

B. female pandas are able to have baby pandas only in a special time

B. young pandas weigh only a few grams each and they are too weak

D. male and female pandas often refuse to have babies in the right time

5. If the present conditions are not improved, giant pandas in the world will disappear _____.

A. in less than a few years

B. in thirteen years

C. in thirty years

D. in the twenties

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