介绍： 1.
A. Heavy economic burden.
B. Eye sight problems.
C. Genetic diseases.
D. Environment problem.

2.
A. Taking a nap during the day.
B. Academic burden.
C. Short-sightedness
D. Outdoor activity.

1. What is the risk of lack of exposure to outdoor light to students in Asia?
A. Heavy economic burden.
B. E...

介绍： 1.
A. Heavy economic burden.
B. Eye sight problems.
C. Genetic diseases.
D. Environment problem.

2.
A. Taking a nap during the day.
B. Academic burden.
C. Short-sightedness
D. Outdoor activity.

1. What is the risk of lack of exposure to outdoor light to students in Asia?
A. Heavy economic burden.
B. Eye sight problems.
C. Genetic diseases.
D. Environment problem.

2. Why are infants not getting enough outdoor light during the day？
A. Taking a nap during the day.
B. Academic burden.
C. Short-sightedness
D. Outdoor activity.

The strong emphasis（强调） on educational achievement in China, Japan and other parts of South East-Asia may be coming at a heavy price. Researchers say that hard work at school plus the lack of exposure（接触） to outdoor light is damaging the eyes of almost nine out of ten students. The scientists say that young people need up to three hours a day of outdoor light, but many infants are also missing out as they nap（打盹） during lunch time. The scientists say that genetic（基因的） factors, long thought to play a big role in short-sightedness, are not as important as the environment. They point to Singapore as a place with several distinct（明显的） ethnic groups, all of whom are now suffering high levels of myopia（近视）. The authors suggest that mandatory（强制的） time outdoors should be considered by educational authorities across South-East Asia as a way of dealing with the problem.
答案：BA