2020-2021学年长沙市第一中学高三英语月考试卷及参考答案
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2020-2021学年长沙市第一中学高三英语月考试卷及参考答案
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
Located inLos Angeles,UniversityofSouthern Californiais in the heart of a leading city. Although LA ranks highly in
The Economist’s Safe Cities Index, navigating and city calls for certain safety precautions (预防措施) along with
practicing common sense.
♦Mobile Safety App Powered by LiveSafe
The Mobile Safety App powered by LiveSafe, manage by the USC Department of Public Safety and the USC
Department of Emergency Planning, is a free downloadable app that mobile users can use to initiate contact with
emergency responders around the campus. Features include: immediate “push button” calls to DPS, easy
reporting for suspicious activity or crimes in progress, and location services to notify friends of your route through
campus.
♦Blue Light Phone Locations
TheUniversity Parkhas multiple blue light phones that are strategically placed throughout campus. Take note of
where the closest ones are on your route. They come in handy in case you lose your phone or in an emergency.
These phones are directly connected to USC’s Department of Public Safety’s 24-hour communications center.
Besides emergency needs, it can also be used to report suspicious activity, request for an escort (护送) if you feel
unsafe and to report a crime.
♦Trojans Alert
Trojans Alert is an emergency notification system that allows university officials to contact you during an
emergency by sending messages via text message or email. When an emergency occurs, authorized USC senders
will instantly notify you with real-time updates, instructions on where to go, what to do (or what not to do), whom
to contact and other important information. All members of the USC community, as well as parents and regular
visitors to campus, are strongly encouraged to sign up for Trojans Alert.
1. What do blue light phones do for students?
A. Guide students through campus.
B. Alert students to crime activities.
C. Light up the way if students feel unsafe. D. Connect them with the safety department.
2. How does USC send out instructions during an emergency?
A. With blue light phones.
B. Via text message or email.
C. Through mobile safe app.
D. By calling all USC members.
3. What is the purpose of the text?
A. To encourage students to fight crime.
B. To introduce USC’s safety department.
C. To provide safety services for USC students.
D. To inform parents of safety risks on campus.
B
It is a question people have been asking for ages. Is there a way to turn back the aging process?
For centuries, people have been looking for a “fountain of youth”. The idea is that if you find a magical
fountain, and drink from its waters, you will not age.
Researchers in New York did not find an actual fountain of youth, but they may have found a way to turn back
the aging process. It appears the answer may be hidden right between your eyes, in an area called the
hypothalamus (下丘脑). The hypothalamus is part of your brain. It controls important activities within the body.
Researchers at New York’s Albert Einstein College of Medicine found that hypothalamus neural (神经的) stem
cells also influence how fast aging takes place in the body.
What are stem cells(干细胞)? They are simple cells that can develop into specialized cells, like blood or skin
cells. Stem cells can also repair damaged tissues and organs.
Dongsheng Cai is a professor at the Albert Einstein College of Medicine. He was the lead researcher in a study
on aging in mice. He and his team reported their findings in the journal Nature, Cai explained when hypothalamus
function is in decline, particularly the loss of hypothalamus stem cells, and this protection against the aging
development is lost. it eventually leads to aging.
Using this information, the researchers began trying to activate, or energize, the hypothalamus laboratory
mice. They did this by injecting the animals with stem cells, Later, the researchers examined tissues and tested for
changes in behavior. They looked for changes in the strength and coordination (协调) of the animals muscles. They
also studied the social behavior and cognitive ability of the mice. The researchers say the results show that the treatment slowed aging in the animals, Cai says injecting middle-aged mice with stem cells from younger mice
helped the older animals live longer.
But these results were just from studying mice in a laboratory. If the mice can live longer, does that mean
people could have longer lives? The next step is to see if the anti-aging effects also work in.
4. In Paragraph 2 a “fountain of youth” is mentioned to ________.
