单项选择题

A. It may make the wearer feel tired.
B. It will gradually weaken the eyes of adults.
C. It can lead to the loss of vision in children.
D. It can permanently change the eye structure.
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单项选择题
A.It enables children to live better. B.It goes down during economic recession. C.It often rises higher than inflation. D.It has gone up 25% in the past decade.
A.It enables children to live better.
B.It goes down during economic recession.
C.It often rises higher than inflation.
D.It has gone up 25% in the past decade.
单项选择题
A.She could improve her foreign languages. B.She could work close to her family. C.She could travel overseas frequently. D.She could use her previous experiences.
A.She could improve her foreign languages.
B.She could work close to her family.
C.She could travel overseas frequently.
D.She could use her previous experiences.
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