阅读材料,回答问题。

材料一  《社会主义好》是20世纪50年代中国大地上流行的歌曲,歌词为:社会主义好,社会主义好,社会主义国家人民地位高,反动派被打倒,帝国主义夹着尾巴逃跑了,全国人民大团结,掀起了社会主义建设高潮,建设高潮。                                                                                                       百度百科

材料二  1957—1966年,党领导全国人民探索社会主义建设道路,尽管发生了严重失误,但仍取得了社会主义建设的重大成就。

材料三 

材料四  实现中国梦必须凝聚中国力量,这就是中国各族人民大团结的力量……中国梦归根到底是人民的梦,必须紧紧依靠人民来实现,必须不断为人民造福。

——***

在中国市场上10瓶水中有7瓶是纯净水。可是这种常见的瓶装水却引发了中德科学家的争议。部分德国专家认为，纯净水非但不含矿物元素，而且还会带走体内的矿物元素，隐含健康风险。而中国的科学家则认为，纯净水中的矿物元素并不重要，纯净水也是安全的。对于一些尚未定论的事物，我们要有科学争论的勇气，更要有勇于实践的胆识、善纳争论的胸怀。一种观点、理论或者一项决议遭到公开的争论并不是多么可怕的事情，相反是促进科学进步、决策合理、社会和谐的突破口。

为什么我们要有科学争论的勇气，更要有勇于实践的胆识？

I'm____. I have a small nose and a small mouth. I have small eyes too.

诫子书

    夫君子之行，静以修身，俭以养德。非淡泊无以明志，非宁静无以致远。夫学须静也，才须学也，非学无以广才，非志无以成学。淫慢则不能励精，险躁则不能冶性。年与时驰，意与日去，遂成枯落，多不接世，悲守穷庐，将复何及！

    Writing text messages (短信）while walking is dangerous. A study says it is more dangerous than texting while driving. Researchers found that there are more____(injure) to texting pedestrians (行人) than there are to texting motorists. Their report says walking is not as easy____we think. We must focus on many things at the same time to walk safely in a straight line. The researchers said that people forget how to walk____(proper), so dangerous things happen to them. They bump into walls and other people. They walk into cars, fall over things in the street, and even fall into holes____down stairs.

    A professor said walking is a difficult action. There are several reasons ____texting makes walking dangerous.____is that people cannot see the street. Another is that they focus on their phone keyboard instead of their feet. A final reason is that their minds are somewhere else — they are not thinking about____(walk) from A to B safely. The professor said over 6,000 people____(visit) his hospital last year because of texting. He said____worst cases are head damage. When a pedestrian is tossed into the air he/she has nothing____(protect) the head. The damage can be serious.