阅读理解CThere is an increasing alarm about the extent of microplastics pollution,which has been found everywhere from Everest to the Arctic.However,it turns out there's an even smaller and more poisonous form of plastic pollution entering remote reaches of the globe.A new study published in Environmental Research found significant quantities of nanoplastic(纳米塑料)in ice samples from both the North and South Poles."Now we know that nanoplastic are transported to these corners of the Earth in these quantities.This indicates that nanoplastic are really a bigger pollution problem than we thought,"study lead author Dusan Materic said in a press release.Nanoplastic are plastics that are smaller than a micrometer in size.Their small size means they are more difficult to study than microplastics,or plastics between five millimeters and a micrometer.But they may be even more dangerous."Nanoplastic are very toxicological active compared to,for instance,microplastics,and that's why this is very important,"Materic said.Materic and his team used new methods to measure nanoplastic pollution in ice samples from Greenland and Antarctica.They sampled a 14-meter-deep ice core from the Greenland ice cap and sea ice from Antarctica's McMurdo Sound.They found that there were an average of 13.2 nanograms per-milliliter of nanoplastic in the Greenland ice and an average of 52.3 nanograms per milliliter in the Antarctic iceBut what was even more surprising than the amount of nanoplastic in the remote ice was just how long they had sat there."In the Greenland core,we see nanoplastic pollution happening all the way from the 1960s.So organisms,despite the lack of the solid evidence,likely all over the world,have been exposed to it for quite some time now,"Materic said.The study also looked at the types of plastic present in the samples.Half of the Greenland nanoplastics were polyethylene(PE),the kind of plastic used for plastic bags and packaging.A quarter came from tires and a fifth were polyethylene terephthalate (PET),which is used for clothing and bottles.

1. 阅读理解

There is an increasing alarm about the extent of microplastics pollution,which has been found everywhere from Everest to the Arctic.However,it turns out there's an even smaller and more poisonous form of plastic pollution entering remote reaches of the globe.A new study published in Environmental Research found significant quantities of nanoplastic(纳米塑料)in ice samples from both the North and South Poles.

"Now we know that nanoplastic are transported to these corners of the Earth in these quantities.This indicates that nanoplastic are really a bigger pollution problem than we thought,"study lead author Dusan Materic said in a press release.

Nanoplastic are plastics that are smaller than a micrometer in size.Their small size means they are more difficult to study than microplastics,or plastics between five millimeters and a micrometer.But they may be even more dangerous.

"Nanoplastic are very toxicological active compared to,for instance,microplastics,and that's why this is very important,"Materic said.

Materic and his team used new methods to measure nanoplastic pollution in ice samples from Greenland and Antarctica.They sampled a 14-meter-deep ice core from the Greenland ice cap and sea ice from Antarctica's McMurdo Sound.They found that there were an average of 13.2 nanograms per-milliliter of nanoplastic in the Greenland ice and an average of 52.3 nanograms per milliliter in the Antarctic ice

But what was even more surprising than the amount of nanoplastic in the remote ice was just how long they had sat there."In the Greenland core,we see nanoplastic pollution happening all the way from the 1960s.So organisms,despite the lack of the solid evidence,likely all over the world,have been exposed to it for quite some time now,"Materic said.

The study also looked at the types of plastic present in the samples.Half of the Greenland nanoplastics were polyethylene(PE),the kind of plastic used for plastic bags and packaging.A quarter came from tires and a fifth were polyethylene terephthalate (PET),which is used for clothing and bottles.

(1) Why should researchers focus more on nanoplastics? A. They are smaller but more dangerous. B. They are more important to science. C. They are easily polluted by ocean water. D. They are more active in cold surroundings.

(2) What can we learn about nanoplastics? A. The North and South poles are the birthplace of nanoplastics. B. Nanoplastics have less influence on the planet than microplastics. C. Nanoplastics have been existing since the 1960s throughout the world. D. Nanoplastics found in the samples are widely used in the daily life.

(3) What does the underlined word "if"refer to in Paragraph 6? A. The Greenland core. B. The Antarctic ice. C. The amount of nanoplastics. D. Nanoplastics pollution.

(4) What's the main idea of this passage? A. Mircoplastics prove to be more dangerous. B. Nanoplastics pose a threat to people's life. C. Nanoplastics are making their way to the poles. D. Mircoplastics set the alarm bells ringing.

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推理判断题; 细节理解题; 新闻报道类; 文章大意;

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