阅读理解。
Wearing the wrong type of glasses will do harm to your eyes. This
is not true for adults, although incorrect glasses may not be good for
children under 10. Ready-made glasses, and not wearing when you
should, won't do harm to your eyes, but you may see better with glasses
that are specially made for you.Watching too much television is bad for
your eyes. This is not true. People with easily affected eyes may find
they get red and aching from staring at a fixed distance for long periods,
but there won't be any lasting effects.Carrots will help you see in the dark.
Carrots are rich in beta-carotene, which the body can change into vitamin
A, too little of which can cause night blindness. However, people in
most countries don't need to worry about vitamin A deficiency (缺乏)，
night blindness is more likely to be connected with another vision problem.
1. According to the passage, which of the following is TRUE?
A. Ready-made glasses will do harm to one's eyes.
B. Wearing the wrong glasses may do harm to children's eyes.
C. The human body is unable to change beta-carotene into vitamin A.
D. Watching less television may do harm to children's eyes.
2. Night blindness is most likely caused by _____.
A. staring for long periods
B. too much beta-carotene
C. not enough vitamin A
D. vision problems
3. According to the article, eye problems can be corrected by _______ .
A. wearing specially-made glasses
B. performing eye exercises
C. cutting back on television
D. eating more carrots
4. Watching too much television can cause _______ .
A. night blindness
B. lasting eye problems
C. a number of vision problems
D. eye trouble for a limited time
5. The main purpose of this article is to _______ .
A. tell people of the importance of their eyes
B. tell people how to protect their eyes
C. tell people to have more carrots
D. tell people something more about their eyes
CH3OH(g) △H1＝－90.7kJ·mol-1