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2024年3月26日发(作者：hovercraft游戏下载)

英语听力精听材料

材料贵精而不贵多，多听好的听力材料，才能有助于听力的快速提高。下面为大家准

备了一些精听材料。

Just as the police bang down the door, the bad guys flush the incriminating

drugs down the toilet. Surely, a scenario we’ve all seen on TV and in the movies.

But, you might be surprised to find out how many drugs innocently wind up in

our lakes and rivers every day.

Household drugs like painkillers, antibiotics and hormones enter the water

system through many channels. For example, some animal feeds contain

antibiotics and flood into rivers with run-off water. Antibiotics are regularly

flushed or dumped down sinks and toilets. Since many sewage treatment plants

don’t effectively remove drugs or hormones, these pounds enter our waterways

and wind up in our tap water.

Are flushed drugs a health concern? Once in a river, antibiotics might affect

wildlife by killing off the normal microbes that are naturally found in the water

and soil and that form the basis of the local ecosystem. Or, perhaps more

dangerously, the microbes may learn to adapt and reproduce in the presence of

antibiotics, developing antibiotic resistance.

At present, mon household drugs are found in many lakes and rivers in

relatively small concentrations, but we can do something to help. We can avoid

throwing drugs down the drain and, instead, take them to a hospital, pharmacy

or hazardous waste center for safe disposal.


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