A.Animal Studies Prove NMN's Anti-Aging Effects
B.NMN's Potential and Risks:A Scientific Perspective
C.How NMN Supplements Are Dominating the Market
D.NMN:The Miracle Anti-Aging Solution Finally Found
D
Microplastics have been detected in human brains at far higher concentrations than in other bodily organs-
and levels are increasing,having risen 50 percent in eight years.
This is the conclusion of a team of researchers from the University of New Mexico (UNM),who said the
findings should trigger alarm."This really changes the landscape.It makes it so much more personal,"UNM
professor Matthew Campen said in a statement."I have not encountered a single human being who says,'There's a
bunch of plastic in my brain and I'm totally cool with that'."
Microplastic (smaller than 5 millimeters in size)and nanoplastic (under 0.001 millimeters)
pollution have become common in the environment and can get into the food we eat.These plastic bits have been
found in various bodily organs-including the kidney,liver-although not at such concentrations as now seen in
the brain the team said.
The researchers identified 12 different types ofplastic within samples collected from the so-called frontal cortex
()-the brain region found above and behind the eyes that had been linked to various capabilities
from abstract thinking through to motor function."We start thinking that maybe these plastics block blood flow in
small blood tube,"Campen said."There's the potential that these nanomaterials interfere with the connections
petween axons (in the brain.They could also be a seed for grouping of proteins involved in dementia
痴呆).We just don't know.
Campen said most of the microplastics that end up in our bodies arrive there via food-meat in particular,as
commercial meat production concentrates plastics across the food chain."The way we irrigate fields with
water containing plastic,we assume that the plastic builds up there,"he said."We feed those crops to our farm
animals.We take the animal waste and put it back on the field."
Microplastic and nanoplastic pollution in the environment is certain to grow,the researchers warn-for even
if we were to cease plastic production tomorrow,existing plastic would still be around to break down into tiny and
then super tiny pieces.
32.Why does the author cite Professor Matthew Campen's words in paragraph 2
A.To emphasize the plastics impacts on individuals
B.To explain the source of plastics in human organs.
C.To trigger a quick response from different researchers.
D.To advocate for reduction measures in plastic production
33.What might nanoplastics in the brain lead to
A.Continuous brain aging
B.Immediate memory loss
C.Disturbed neural bonds.
D.Complete blood tube blockage.
34.What can be inferred about commercial meat production
A.It relies on polluted irrigation.
B.It removes plastics completely
C.It reduces the waste of crops.
D.It accumulates plastics in food chain.
35.What does the last paragraph's warning imply
A.Nanoplastics is less harmful
B.Anti-pollution efforts are effective.
C.Existing plastics still pose a threat
D.Stopping production solves pollution.
第二节（共10小题；每小题1.5分，满分15分）
阅读下面短文，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
G12名校协作体高三英语试题第5页共8页
