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短文改错：以下文章有十处错误。
How does the disease present?
Well,
from
what
is
known
so
far,
there
can
be
the
number
of
symptoms
range
from
mild
to
severe.
There
can
be
fever
and
respiratory
symptoms
such
as
cough
and
short
of
breath.
In
more
severe case, there
’
s been pneumonia(
肺炎
), kidney failure(
肾衰竭
),
and death. The mortality rate(
死亡率
) was not known yet.
How can we tell if someone is infected or not?
The
infection
can
be
diagnosed(
诊
断
)
by
a
test
calling
PCR
or
Polymerase
Chain
Reaction(
聚合酶链反应
).
This
test
identifies
the
virus
basing
on
its
genetic
fingerprint(
指纹
).
There
is
current
no
specific
medication
for
the
virus
and
treatment
is
supportive
care.
There
’
s
no
currently
vaccine(
疫苗
)
to
protect
the
virus.
Treatment
and vaccines are in development.
阅读理解：
Reading
In December 2019, there was a cluster of pneumonia(
肺炎
) cases in
China.
Investigations
found
that
it
was
caused
by
a
previously
unknown virus-now named the 2019 Novel Coronavirus. In this text,
we
’
ll take a quick look at what
’
s currently known about the virus.
1
Keep in mind(
记住
) that this is a new virus and what
’
s known about
the virus now might change in the future.
Coronaviruses(
冠状病毒
) are a large group of viruses. They consist of
a core of genetic material
（遗传物质）
surrounded by an envelope with
protein
spikes(
蛋白棘突
).
This
gives
it
the
appearance
of
a
crown.
Crown in Latin is called
“
corona
”
and that
’
s how these viruses get
their name.
There are different types of coronaviruses that cause respiratory(
呼
吸的
) and sometimes gastrointestinal(
胃肠的
) symptoms. Respiratory
disease can range from the common cold to pneumonia(
肺炎
). And
in most people, the symptoms tend to be mild. However, there are
some
types
of
coronaviruses
that
can
cause
severe
disease.
These
include the Severe Acute Respiratory Syndrome (SARS
即严重急性呼
吸综合征，俗称“非典”
) coronavirus first identified in China in 2003
and
the
Middle
East
Respiratory
Syndrome
(MERS
中东呼吸综合征
)
coronavirus
that
was
first
identified
in
Saudi
Arabia(
沙特阿拉伯
)
in
2012.
The 2019 Novel Coronavirus was first identified in China. It initially
occurred
in
a
group
of
people
with
pneumonia(
肺炎
)
who
’
d
been
associated
with
a
seafood
and
live
animal
market
in
the
city
of
Wuhan.
The
disease
has
since
spread
from
those
who
were
sick
to
others, including family members and health care staff(
员工；全体职
2
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