即使没有这场席卷全球的金融危机，中国的未来也充满着不确定性。在达到了人均2000～3000美元的发展高度以后，中国经济究竟还能不能持续、健康地保持高速增长，是一个没有确定解的问题。没有非常明确和确定的规则，市场中人的努力和注意力，同样不可能集中于结果不确定的经济竞争，也就无从动员人们勇敢地面对未来市场的不确定性，尽最大努力争取收益、避免灾祸。
这段文字主要想告诉我们( )。
A．可靠的企业制度具有基础意义
B．强大的国家要靠有效的税收来维持
C．中国经济需要以规则的确定应对结果的不确定
D．法律要有很高的稳定性和可靠性
参考答案：C
解析：本题考查文段主旨的归纳。文段首先明确指出中国的未来具有不确定性，接着“没有非常明确和确定的规则”一句指出经济发展中规则的确定性具有重要的意义。因此只有C项说法符合题意。A项、B项和D项三项企业制度、税收和法律是具体的规则，因此说法都带有片面性。故选C。
Our eyes are very important. But many of us pay little attention to the importance of eye care. It is said that if you take care of your body, then you can surely be healthy. That is why our eyes should be given a lot of care. 小题1: . There are several causes leading to your poor eyesight. Like Televisions, computers and reading. Something dirty can cause redness (红肿) and they will make you feel uncomfortable. If this happens, the best way is to clean your eyes by using cold water. 小题2: . For example, wearing sunglasses can serve as a great way to protect your eyesight from UV rays (紫外线) in the strong sunlight. Some foods will do good to your eyesight. Remember that vitamins A, C and E are good for eyes. Try to eat food groups that have these vitamins. 小题3: . If a person exercises regularly and eats the right kind of food, his eyes will stay in good condition for a long time. All above are natural ways of eye care that help us keep healthy eyes. 小题4: . In a word, eye care is very important, no matter how old a person is. 
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