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问题 单项选择题

下列关于标点符号的说法，错误的是（）。

A.标点符号的作用主要是用来表示停顿、语气以及词语的性质与作用

B.句子中的所有停顿都要用标点符号表示出来

C.点号的作用在于点断，标号的作用在于标明

D.点号又分为句末点号和句内点号

答案

参考答案：B

单项选择题

近年来伴随着快速推进的城市化进程和住房商品化演进，不少大中型城市的城中或近郊，均出现了在集体土地上开发建设并入市交易的小产权房，且这一现象呈蔓延之势，其社会影响倒逼政府相关部门进行相关政策的顶层设计。这说明（）

①改革是社会发展的根本动力

②上层建筑要适应经济基础的发展

③社会存在决定社会意识

④社会意识与社会存在如影随形

A.①②

B.③④

C.②③

D.①④
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单项选择题

Sustainable development is applied to just about everything from energy to clean water and economic growth, and as a result it has become difficult to question either the basic assumptions behind it or the way the concept is put to use. This is especially true in agriculture, where sustainable development is often taken as the sole measure of progress without a proper appreciation of historical and cultural perspectives.
To start with, it is important to remember that the nature of agriculture has changed markedly throughout history, and will continue to do so. Medieval agriculture in northern Europe fed, clothed and sheltered a predominantly rural society with a much lower population density than it is today. It had minimal effect on biodiversity, and any pollution it caused was typically localized. In terms of energy use and the nutrients captured in the product it was relatively inefficient.
Contrast this with farming since the start of the industrial revolution. Competition from overseas led farmers to specialize and increase yields. Throughout this period food became cheaper, safer and more reliable. However, these changes have also led to habitat loss.
What’s more, demand for animal products in developing countries is growing so fast that meeting it will require an extra 300 million tons of grain a year by 2050. Yet the growth of cities and industry is reducing the amount of water available for agriculture in many regions.
All this means that agriculture in the 21st century will have to be very different from how it was in the 20th. This will require radical thinking. For example, we need to move away from the idea that traditional practices are inevitably more sustainable than new ones. We also need to abandon the notion that agriculture can be "zero impact". The key will be to abandon the rather simple and static measures of sustainability, which centre on the need to maintain production without increasing damage. Instead we need a more dynamic interpretation, one that looks at the pros and cons of all the various ways land is used. There are many different agricultural performances besides food yield: energy use, environmental costs, water purity, carbon footprint and biodiversity. It is clear, for example, that the carbon of transporting tomatoes from Spain to the UK is less than that of producing them in the UK with additional heating and lighting. But we do not know whether lower carbon footprints will always be better for biodiversity. What is crucial is recognizing that sustainable agriculture is not just about sustainable food production.

Specialization and the effort to increase yields have resulted in ______.

A. localized pollution
B. the shrinking of farmland
C. competition from overseas
D. the decrease of biodiversity
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