题干

广西壮族自治区的“左江花山岩画文化景观”是世界上迄今发现的画面最大、图像数量最多的涂绘类岩画。花山岩画主要描绘了各式各样的人物和剑、钟、铜鼓等器物,以及日月星辰等天体图形,记录了古代先民的社会生产和社会生活。材料表明(    )

A:生产方式制约社会发展进程

B:生产关系是对生产力的反映

C:上层建筑反作用于经济基础

D:社会意识是对社会存在的反映

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D

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    Chinese e-commerce websites fail to pay more attention to older consumers, says a news report.

    There's been a thought that younger consumers have been the driving force of online buying. That may not be the case. According to a statement from Alipay, the average expenditure (支出) of Alipayusers born before the 1960s was 31,000 yuan in 2012, much higher than 14,000 yuan of those born after the 1980s. It shows that online shopping has become akey part of people's daily consumption, for both young and old.

    Besides shopping, people pay bills such as water bill, electricity bill, and credit card repayment online. The middle-aged and senior consumers are also participating in that consumption revolution.

    Liu Chen, 56, said that his online expenditure in 2014 was over 50,000 yuan, about half of the total annual expenditure. He always pays his telephone bill online. Clothes, electrical appliances and kids' snacks are themain items he purchases online.

    Liu's shopping strategy is to find something good online first, then go to shops to check it out, and finally buy it online because it is cheaper. As quality concerns him, Liu only buys items that come with aguarantee.

    Stories such as those from Liu are representative of millions of middle-aged and older Chinese, which show the great potential of the aged inthe Chinese consumption market. Yet, the market seems not to be valued as it should be.

    Some Chinese e-commerce websites such as jd. com, dangdang. comand amazon. cn don't have a category for goods for the elderly on their mainpages. Alibaba's platform does have one, but the goods in it are not as abundant as other categories. Moreover, Taobao's category is not really designed for elders, but their children.

    Despite the seeming lack of commitment to older consumers, the Chinese market for the elderly is clearly huge, and e-commerce websites should takegreat efforts to develop it.