美国科学家沃尔特·威力特研究发现,人体不需要额外的钙,摄取过多的钙会增加患癌症等疾病的风险。此前有些科学研究由于研究方法错误得出了错误的结论,误导了消费者。沃尔特的研究佐证了( )①量的积累必然导致质变②实践是认识发展的动力③认识受各种主客体条件的限制④真理在实践中不断被推翻超越
Nine in ten high school students say there are significant differences in their attitude toward chatting on line, compared with _________ of their parents.
Do you think that bridge ____ 2,000 meters long? It doesn’t seem ____ long.
We now live in ____ is called the Information Age.
One hundred percent _______ to your studies, though it can be lonely and no fun at all, will leave precious marks on your youth.
While intelligent people can often _____ the complex, a fool is more likely to complicate the simple.