2020届成都七中高三英语月考试卷及答案
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2020届成都七中高三英语月考试卷及答案
第一部分 阅读（共两节，满分40分）
第一节（共15小题；每小题2分，满分30分）
阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项
A
Older adults who sleep six hours or fewer a night may have elevated risk for dementia(痴呆症) and other
cognitive (认知的) issues, a new study finds.
Researchers at Stanford University measured seniors' (ages 65 to 85) dementia risk and cognitive abilities,
finding higher risk in those patients who regularly slept six or fewer hours compared to those who slept seven or
eight hours. Those seniors who slept nine or more hours also had lower cognitive functions and other health
issues, but the researchers didn't find the same high dementia risk in this group.
The findings demonstrate how important it is for adults to maintain a healthy sleep cycle, especially as they
get older.
As adults age, it's common for their sleep patterns to change or becomedisrupted— leading to longer, shorter,
or more irregular sleep. This disruption may be linked to Alzheimer's and other forms of dementia, impacting
seniors' ability to remember information, problem-solve, and go through everyday behaviors. Sleep disruption can
also be caused by or heighten depression, cardiovascular disease（冠心病）, and other conditions.
A recommended sleep time for seniors is seven to eight hours, the researchers said. Six or fewer hours
corresponded to short sleep, while nine or more hours corresponded to long sleep.
The Stanford researchers measured levels of beta amyloid, a protein in the brain that is typically found in high
levels when a patient develops Alzheimer's. In addition, the researchers used several tests for memory, attention,
spatial skills, and executive function to identify patients' cognitive abilities. Those patients sleeping for six hours or
fewer a night were more likely to develop dementia, the researchers found. The low-sleep patients had higher
levels of beta amyloid.
The Stanford researchers found that patients with lower sleep also performed worse on memory tests, while
those with higher sleep (more hours) performed worse on executive function tests，which measure the brain's
ability to switch between different tasks.
―The main takeaway is that it is important to maintain healthy sleep late in life, Winer told CNN.
1. What does the underlined word “disrupted” in paragraph 4 mean?
A. difficult B. disordered C. dissolved D. different
2. According to the findings, which of the following is NOT related to the disrupted sleep?
A. It is more likely to cause old people to have bad memories over issues.
B. It may contribute to dementia, cardiovascular disease and other illnesses.
C. Some daily behaviors perhaps differ from those whose sleeping is normal.
D It tends to bring all the old people to undergo brain scans and cognitive tests.
3. What can we infer from the study?
A. A proper sleep time for seniors is seven to eight hours.
B. Low and high sleep patients were both poor at memory tests.
C. Executive function test is applied to measure the capacity of brain.
D. Keeping a healthy sleep for older adults late in life is crucial.
B
When you walk with a backpack, do you know how the things inside move from side to side? Now scientists
havefigured out how to tap into that movement to produce electricity.
Picture a pendulum (摆锤) fixed to a backpack frame and stabilized with springs on either side. The pack’s
weight is attached to the pendulum, so the pendulum swings side to side as you walk.Then a machine is driven by
that swinging movement, and spits out electrical current to charge a battery.
Volunteers carried the pack while walking on a running machine and wore masks to measure the flow of
O2and CO2. Walking with the slightly swinging 20-pound load, the device (设备) did not significantly affect the
volunteers’ metabolic (新陈代谢的) rate compared to when they carried the same weight fixed in place. In fact,
the energy-harvesting pack reduced the forces of acceleration they’d feel in a regular pack, which might mean
greater comfort for a long hike. And the device did produce a steady trickle (涓流) of electricity. If you up the load
to 45 pounds, the swing of the pack could fully charge a smart phone only after 12 hours. The details are in the
journal Royal Society Open Science.
The device produces electricity from human movement and has been identified as a workable solution to
providing a renewable energy source for portable electronic devices. It is particularly useful for those who work in
remote areas, as these people often carry a lot of weight in a backpack for their exploration.
But here’s a realconundrum: the energy-harvesting device currently weighs five pounds. The researchers say
