《2025年学习指导用书英语第一册》

二、阅读理解。
A
When you think of the Arctic (北极), you imagine an icy land of pure white snow. Others imagine it as the last clean place left on Earth. However, we have polluted the deepest oceans with plastic trash.
German scientists have recently found microplastics in Arctic snow. Microplastics are pieces of plastic smaller than 5 millimeters (毫米). Sadly, the scientists found 1,800 pieces of microplastics per liter of snow.
How is plastic pollution reaching the Arctic? Some scientists claim that the majority of the microplastics in the snow comes from the air. They fall off of plastic objects and are moved by the wind, just like dust. They mix with ice in the air and fall to the ground as snow.
Are they bad for us? Scientists cannot answer this question for now, according to the World Health Organization. We do know that our bodies cannot take in "large" pieces of microplastics. However, if the plastics are small enough, they can find ways into our bodies and stay there for a long time.
Microplastics have also been found in rivers and oceans around the world. They start in our wastewater when we wash clothes with plastic fibres. The wastewater then flows into rivers and out to sea, where microplastics are eaten by sea animals. If people then eat these animals, it means that they're eating the plastic as well.

答案： 1. B
解析：根据第一段“we have polluted the deepest oceans with plastic trash”可知，我们用塑料垃圾污染了海洋，选B。
2. A
解析：根据第二段“the scientists found 1,800 pieces of microplastics per liter of snow”可知，每升雪中发现1800片微塑料，选A。
3. C
解析：根据第三段“the majority of the microplastics in the snow comes from the air”可知，雪中微塑料主要来自空气，选C。
4. D
解析：根据第四段“Scientists cannot answer this question for now”可知，科学家目前不能确定微塑料是否对我们有害，D选项“科学家认为微塑料对我们有害”表述错误，选D。
5. B
解析：根据第五段“They start in our wastewater when we wash clothes with plastic fibres”可知，微塑料始于我们的废水，选B。