(B)
Which her eyes feeling increasingly tired and her vision blurry(模糊的)，l6-year-old Sun
run went to the hospital with her parents in January.She was shocked when she found out that
her eyesight dropped from 5.0 to 4.6 in only a term."A few of my friends have had the same
experience lately,"Sun said.
In fact,poor eyesight among Chinese primary and high school students rose from 59.2%to
70.6%in the first six months of 2020,according to the Ministry of Education.
To protect students'eyesight,the Chinese government has worked out new requirements for
school supplies and equipment that will take effect on March 1,2022.For example,according to
the requirements,the size of text in students'textbooks should be no smaller than nine-point.
Teachers should also avoid using projectors()or other multimedia equipment that is
too bright,Beijing Daily reported.
There are also requirements for desks and classroom lights.For example,these lights
should give off as little blue light as possible.Blue light is bad for our eyes,as it can kill the
photoreceptor cells(感光细胞)we need for vision,.according to Harvard Medical School.Many
of the electronic devices(电子设备)we use every day,including our phones and computer
screens,give off blue light.
Chinese government has also taken.other steps to protect students'eyesight in China.In
May 2020,the National Health Commission asked schools to make sure that students have at
least two hours of outdoor activity a day.
)51.At the beginning of the passage,the writer leads in the topic by
A.telling a story
B.giving an example
C.giving some numbers
D.answering some questions
)52.Chinese students who experienced poor eyesight increased by in the first six
months of 2020.
A0.4%
B.11.4%
C.592%
D.70.6%
()53.To protect students'eyesight,the Chinese government is asking
a.school to use textbooks with larger text
b.school to use lights that give off less blue light
c.school not to use blue light bulbs in classrooms
d.teachers to avoid using overly bright multimedia equipment
A.abc
B.abd
C.acd
D.bed
)54.Paragraph 5 is mainly about
A.how to use blue light correctly
B.how to reduce the use of blue light
C.how blue light affects us and where it's from
D.why the government is protecting students'eyesight
6
