解析　主旨大意题。根据全文尤其是第一段最后一句、第二段第一句和第三段第一句可知本文主要讲述了父母如何了解孩子以及如何与之有效地进行交流。答案　DB

　　体裁：说明文　话题：现代生活　时间：8分钟meet the demand.These days，consumers can choose between water sourced from Icelandic glaciers or the thawing snows of Mt.Fuji；there's even one brand—Woof Water—specially designed for dogs.ntal cost.According to the Earth Policy Institute，producing all those plastic bottles requires some 17 million barrels of oil a year.The energy needed to process and transport the bottles rises to 50 million barrels—enough to run 3 million cars for a whole year.Meanwhile，water itself is growing increasingly scarce，prompting some communities to question the wisdom of giving bottling companies free rein (缰绳) to siphon_off local supplies.Bottling plants can consume hundreds of millions of gallons of water a year－spring sources preferred by consumers are precisely the sources most vulnerable (脆弱的) to over－pumping.of Mayors is working to manage bottling plants and monitor the effect of thrown－away bottles；leaders in San Franciscourther still：This month－cent tax on every bottle sold－water bans.－pronged counterattack.Individual brands are seeking to clean up their image：Fuji Water recently promised to go carbonnegative：They've launched a major lobbying (游说) effort and legal campaign to try to roll back the new efforts.(契机) is with the reformers：Last monthal influence.With expert witnesses blasting bottling companies and accusing the FDA of failing to properly monitor the industry，Kucinich pledged to examine the state of local and national regulations.

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