锅炉对给水质量有哪些要求？

The field of medicine has always attracted its share of quacks and charlatans — disreputable women and men with little or no medical knowledge who promise quick cures at cheap prices. The reasons why quackery thrives even in modern times are easy to find.To begin with, pain seems to be a chronic human condition. A person whose body or mind "hurts" will often pay any amount of money for the promise of relief. Second, even the best medical treatment cannot cure all the ills that beset men and women. People who mistrust or dislike the truths that their physicians tell them often turn to more sympathetic ears.Many people lack the training necessary to evaluate medical claims. Given the choice between (a) a reputable physician who says a cure for cancer will be long, expensive and may not work at all, and (b) a salesperson who says that several bottles of a secret formula "snake oil" will cure not only cancer but tuberculosis as well, some individuals will opt for "snake oil".Many "snake oil" remedies are highly laced with alcohol or narcotic drugs. Anyone who drinks them may get so drunk or stoned that they drown their pains in the rising tide of pleasant intoxication. Little wonder that "snake oil" is a popular cure-all for minor aches and hurts! But let there be no misunderstandings. A very few "home remedies" actually work. However, most remedies sold by quacks are not only useless, but often can be harmful as well.

Which of the following statements is NOT true

A．Quacks are really sympathetic.

B．Snake oil does not work.

C．Doctors cannot cure all ills.

D．Patients are often impatient.

上消化道出血指

A．屈氏韧带以上的消化道出血

B．十二指肠出血

C．胆道出血

D．胰腺出血

E．胃、空肠吻合术后的空肠出血

阅读下列材料，完成第题：

联合国北京办事处低碳发展报告显示，中国需要60多项核心技术来实现其降低电力、

交通、建筑等主要工业领域碳浓度的目标，然而这60多项核心技术有70%不为中国人

所掌握。

中美是世界最大的能源生产国和消费国，在维护全球能源安全和清洁能源发展上有着共

同的利益和责任，也面临着共同的挑战。在习 * * 副 * * 访美期间，由美国商务部与中

国商务部共同组织，杜邦公司与英利能源(中国)有限公司签署了价值1亿美元的光伏材

料战略协议。这一协议致力于推动对太阳能的开发利用。

图为2010年世界能源消费结构与中国能源消费结构图

小题1:（1）比较两图，反映了哪些经济现象？（4分）

（2）运用经济常识“经济全球化与对外开放”的有关知识分析说明改善能源消费结构对我

国经济发展的影响。（8分）

小题2:运用“国家职能”和“国际社会”有关知识分析说明上述材料。（10分）

某玩具汤匙质量为50g，则汤匙重       N。把汤匙放在手指尖上，调节支撑汤匙的支点，可使其在手指尖上水平静止，如图所示，请在图中画出此时汤匙受力的示意图。

以下革命军事题材小说中，富于浪漫主义传奇色彩的是（）。

A、《红日》

B、《林海雪原》

C、《保卫延安》

D、《百合花》