防止作废文件的非预期使用，若因任何原因而保留作废文件时，对这些文件进行适当的标识。

（17分）阅读材料，回答问题：　　

材料一：广东省GDP由2002年的13502亿元增加到2007年突破3万亿元，五年年均增长14.5%，占全国GDP的比重由1/9提高到1/8，折合美元将超过台湾地区。这是广东在1998年GDP超过新加坡、2003年超过香港之后，又朝着赶超“亚洲四小龙”迈出了坚实一步。　　

材料二：　2007年12月25日　至26日，中共广东省委十届二次全会召开。广东省委书记汪洋在讲话中表示，争当实践科学发展观的排头兵，必须进一步解放思想，转变观念，他就此提出三个方面的要求。第一，克服自满情绪，增强忧患意识。第二，克服狭隘视野，树立世界眼光。第三，克服“以物为本”，坚持以人为本。　　

请根据《生活与哲学》的相关哲理，结合以上材料谈谈为什么广东在经济高速增长的情况下，还必须进一步解放思想，增强忧患意识？　　

列车以150km/h的速度匀速行驶，在2h内行驶的路程是______ km．

Science Academy study: It has been demonstrated that with natural methods, some well-managed farms are able to reduce the amounts of synthetic fertilizer and pesticide and also of antibiotics they use without necessarily decreasing yields; in some cases yields can be increased.
Critics: Not so. The farms the academy selected to study were the ones that seemed most likely to be successful in using natural methods. What about the farmers who have tried such methods and failed
Which one of the following is the most adequate evaluation of the logical force of the critics’ response

A．Success and failure in farming are rarely due only to luck, because farming is the management of chance occurrences.

B．The critics show that the result of the study would have been different if twice as many farms had been studied.

C．The critics assume without justification that the failures were not due to soil quality.

D．The critics demonstrate that natural methods are not suitable for the majority of farmers.

E．(E) The issue is only to show that something is possible, so it is not relevant whether the instances studied were representative.

下列不是半夏厚朴汤功用的选项是（）

A.散结

B.行气

C.止痛

D.化痰

E.降逆

“玉不琢，不成器；人不学，不知道”的思想出自 ( )

A．《学记》

B．《大学》

C．《论语》

D．《师说》