This 3-mile stretch of sand and tide pools beneath a castle of 80-foot cliffs is a California tourism poster if there ever was one.Nothing disturbs the perfect，sunny view，except—once you're aware of them—micro-plastic particles（顆粒）.But you have to look close— on-your -hands-and-knees close—to see one.And once you do，you see another and another—so many that you may not think of this，or any beach，the same way again.These tiny pre-production plastic balls that manufacturers（生產商）melt down to form everything have been escaping factories，container ships，trains，trucks—and public notice—for decades.
The 2- to 3-millimeter，multicolored balls are a subset（子集）of micro-plastic—plastic particles less than 5 millimeters in size.Micro-plastic particles accumulate where water takes them，and they've been found on shorelines of every continent.
Dr McReynolds is an environmental scientist who's now joined a global movement studying their trail into the environment.Establishing a baseline count of the presence of micro-plastic particles—and，more broadly，any micro-plastics—is the focus of Dr McReynolds' scientific study here.Charting the count，noting tide，current，and weather conditions will show if amounts are increasing，and perhaps at what rate and why.That knowledge，he says，can inform solutions to plastic pollution such as regulation of their use.
"What are you doing？Picking up trash？" asks a steady stream of beach walkers when ever Dr McReynolds' crew walks onto the beach and sets up equipment.These are teachable moments for Dr McReynolds.
One recent morning he told some beach walkers how micro-plastic particles are believed to absorb toxic chemicals，and—because they resemble fish eggs—are eaten by fish and birds and enter the food chain.Almost right on time，a seagull hopped up to a plastic-coated photo of micro-plastic particles and hungrily pecked（啄食）at it.
Will his work help save the world？Dr McReynolds waves a finger at that idea，"I won't ever use that word..I won't save the world from this pollution problem.Preserve it，yes.We want to take care of it."
（1）What do we know about micro-plastic particles from paragraph 1？ BB
A．They are too small to be seen.
B．They have been ignored for long.
C．They are products of plastic balls.
D．They can be made into almost everything.
（2）What does Dr McReynolds focus on in his study？ DD
A．Classifying plastic particles into subsets.
B．Finding solutions to plastic pollution.
C．Charting the tides and currents of oceans.
D．Creating a data collection for micro-plastics.
（3）What does a seagull's pecking at the picture prove？ CC
A．The interesting teachable moments.
B．The spread of poisonous chemicals.
C．The harmful effect of micro-plastic particles.
D．The beauty of the photo of micro-plastic particles.
（4）What does Dr McReynolds expect of his work？ BB
A．To save the world.
B．To protect the earth.
C．To educate the public.
D．To provide solutions.
【答案】B；D；C；B
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發布：2024/7/17 8:0:9組卷：25引用：7難度：0.5
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.It will become more popular in the future.Yes，we are talking about the smart garbage can.
（2）.The environmental problems have become constant headaches in the development of those cities.Encouraging garbage classification has become an effective way.
In some cities，a variety of multifunctional smart garbage cans are being put into use.In Beijing，for example，a smart garbage can is equipped with an LED screen，which not only shows national policies on garbage classification but also shows the correct steps for garbage sorting.It can also calculate the weight of the garbage and the accumulated points one can get.They can be traded for some articles of daily use.（3）.Its body is actually a screen.It is equipped with some Internal sensors.When people throw garbage into it，the internal sensors can automatically tell the types of the garbage.Meanwhile，people can see how to deal with them. （4）.
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A.Garbage sorting has been a new fashion.
B.Another kind of garbage can is even smarter.
C.It is no wonder that residents cheered for their presence.
D.Such a way of handling garbage has appeared in some cities.
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G．First came the theory that humans have a basic desire to connect with nature．發布：2025/1/1 17:0:1組卷：6引用：2難度：0.5