Which of the following disease is close related with nutrient A: Diabetes B: Red green color blindness C: Night blindness D: Stroke E: Sickle cell anemia

The passage mainly about（） A: color and its surprising effect B: the eyes of likely things C: danger caused by color blindness D: color blindness and color preference

Among people who suffer from colour blindness,________ .

This is an illness that can result in total blindness ________ left untreated.

“On his Blindness” and “On his Deceased Wife” are the two best-known of Milton's ( ).

But history shows the fallacy of this belief. A: blindness B: ridiculousness C: correctness D: falseness

中国大学MOOC: In his blindness, Milton wrote his most important poetic works, such as________.

WHO prescribed visual acuity lower than ­­_____ for blindness ( ) A: 0.1 B: 0.02 C: 0.05 D: 0.08

Night blindness is mainly caused by lack of( ).() A: Vitamin A B: Vitamin B1 C: Vitamin D D: Vitamin E

QUESTION 1: () A: An experimental new treatment for blindness with pigs by Chinese<br/>scientists. B: Five million people in China are estimated to have damaged corneas. C: There are only 5,000 transplants from human donors each year in<br/>China. D: An experimental new treatment for blindness with dogs by Chinese<br/>scientists.