已知柠檬醛的结构简式为：判断下列说法不正确的是：(). A.它可使KMnO4溶液褪色

Several days ago, a Beijing-based IT company fired about 400 people overnight.  No one had expected the job cuts, which broke with traditional ways of letting go of workers in China.  Moreover, what was special about this case was that the day before the 400 were fired, they all received from their boss a gift—the book “Who Moved My Cheese?”

The book—a bestseller in the US—is being used by men and women to deal with changes in their lives and work. Some large organizations, including Coca-Cola, Kodak and General Motors, ask their employees to read it in order to encourage them to be active towards changes.

Cheese is something related to everyone’s livelihood-Our jobs, the industries we work in, relationships and love as well.

With China’s official entry into the WTO, the whole nation will face up to more changes and challenges. So what we should do once this “cheese” on which we are so dependent is moved?

“Whatever challenges and changes we meet, we should face up to them bravely,” Jiang Hengwei, a civil servant said after reading the book.

Professor Zhang Yang in Renmin University of China agrees. “We should change our way of thinking. The coming competitive foreign companies and products provide us with great chances to learn from them and improve our own products to meet international standards and be more competitive.”

“With hard work and wisdom, we will create a much larger and better piece of cheese.” Zhang smiled confidently.

小题1:. The whole passage is about_________.

A．a bestseller in the US

B．what people think about China’s entry into the WTO

C．the change in people’s attitude towards changes and challenges

D．how a book influences the Chinese workers小题2: The company in Beijing gave each of the 400 fired workers a copy of “Who Moved My Cheese ”in order to_________.

A．be more competitive with foreign firms

B．find an excuse for their job cuts

C．let the workers make a living on their own

D．encourage the fired workers小题3:. The word “cheese” in the passage can refer to_________.

A．something we depend on

B．a most important kind of food

C．change or challenge

D．way of life小题4:. From what Heng wei and Professor Zhang Yang said, we can know that____________.

A．they have different opinions on changes and challenges

B．people are not afraid of competition from foreign companies

C．the Chinese people are ready to face any changes and challenges

D．they are both greatly encouraged by the book

下列哪一项不是脊柱结核的表现（）

A.椎体楔形变

B.椎旁脓肿

C.流注脓肿

D.拾物试验阳性

E.直腿抬高试验阳性

（三）阅读下文，完成文后15-18题

饮食不宜过烫

口腔食道都怕烫，热饮热食有损伤。上皮增生会恶变，吃饭喝汤不要忙。

温度对人具有诸多微妙作用。生命在进化中都有自身最适合的温度，进化程度越高，要求最佳适宜温度越严格。人体体温在37。C左右时，代谢活动处于最佳状态，人体细胞对高温的耐受性比低温差。热对肿瘤细胞也产生微妙的生物学作用，许多试验证明，肿瘤细胞的致死温度临界点为42.5。C～43。C，在此温度范围内，延长加温时间可抑制肿瘤细胞生长，由此产生了温热疗法治疗肿瘤。

但是事物都具有两面性。流行病学调查发现，一些地区的食管癌、贲门癌、口腔癌又可能与热饮热食有关，就是说有可能某些黏膜上皮的肿瘤是“烫”出来的。我国新疆哈萨克族居住的地区喜欢饮用热奶茶，一日数遍；东南沿海潮汕地区的居民喜喝“功夫茶”，且要趁热饮用；太行山区的人们习惯于趁热喝大碗粥。①这些地区都是我国食管癌的高发区。当然，肿瘤的发生原因复杂，并非单一因素，流行病学调查，太行山区成为食管癌高发区除热食外，还与饮食特点如粗、快、硬等有关。

研究发现，人体在37。C左右的情况下，口腔和食管的温度多在36.5。C～37.2。C，最适宜的进食温度在10。C～40。C左右，一般耐受的温度最高为50。C～60。C。当感到很热时，温度多在70。C左右。②经常热食的人，在温度很高的情况下也不觉得烫，但是在接触75。C左右的热食、热饮时，娇嫩的口腔、食管黏膜会有轻度灼伤，灼伤的黏膜表层会及时脱落、更新，基底的细胞会迅速增生、更新、补充、，久而久之，增生的细胞速度如异常加快或在不良刺激下发生变异，最终产生不良后果。另外，由于黏膜在热刺激不断增加的情况下会增厚，增厚的黏膜受热刺激反应会越来越不敏感，加之食管黏膜的神经反射本来就很迟纯，这样会越来越不怕热，越不怕热会越敢吃烫的东西，而吃得越烫，口腔黏膜会越增厚。如此恶性循环，人会不由自主地接受越来越严重的灼伤刺激。这种刺激带来的损伤还有可能引起久治不愈的食管炎，这种食管炎有时伴有间变细胞，有人提示这有可能是癌前病变之一。研究人员发现，食管癌往往合并有食管炎，食管炎往往比食管癌早10年。

热饮热食不但与肿瘤的发生有关，而且对食物的消化吸收也不利。食物太烫，在口腔存在时间偏短，刺激唾液分泌减少，以及唾液与食物混合过程不充分，这不利于饮食的消化吸收。另外，温热刺激能掩盖味觉的充分体验，往往难以细细品味各种食物的美味。

饮食过烫，不论从防癌或一般饮食卫生角度看，都属于不良的生活习惯。应努力纠正，尤其是那些有食管贲门癌家族史的人，更应早日改弦易辙。

清淡温凉吃美味，食不过烫保平安。

小题1:、文章用四句诗开头，有什么作用？（2分）

小题2:、细读全文，说一说“热饮热食”对人体有哪些危害？这些结论是通过什么途径得出的？（5分）

小题3:、划线处各用了哪种说明方法？请任选一处说明它的作用。（4分）

小题4:、文章句子“流行病学调查发现，一些地区食管癌，贲门癌、口腔癌又可能与热饮热食”中“可能”能不能删去？为什么？（2分）

凝血酶在凝血过程中的作用有（）

A.促使纤维蛋白原转变为纤维蛋白单体

B.自我催化作用，如增强Ⅷ、Ⅴ的活性

C.激活因子ⅩⅢ

D.激活组织因子

E.促进血小板释放反应

热镀锌按退火方式的不同可分为哪两种类型？