制定学校各项管理制度，应当遵循以下基本原则（　）。A．合法性原则　 B．公开性原则

生活中处处有化学，下列有关叙述正确的是（　　）

A．聚氯乙烯可用于制作食品包装袋

B．尼龙、棉花、羊毛均属于合成纤维

C．糖类、蛋白质、水、维生素都是人类需要的营养物质

D．氢、氧、铁、锌都是人体必须的微量元素

Questions 61—65 are based on Passage Two:Passage TwoAs the 21st century begins, a number of leaders in politics, education, and other professions believe that the US must adopt some new values to go along with the old traditional ones. What new values should Americans adopt This is a very difficult question to answer. Certainly, a greater value should be placed on the conservation of natural reasources; Americans should learn to use less and waste less. But conservation has never been a p value to Americans, who have believed that their country offered an endless,abundant supply of natural resources.Recently, progress has been made—more and more Americans are recycling their paper,cans,bottles,and other goods—but old wasteful habits died hard. Furthermore,the need to protect the environment may conflict with the need for jobs,as in the Northwest ,where conservationists battle lumber companies that want to cut down ancient redwood trees. A belief in the value of conservation is still compared with other American values; it can become per only as Americans see the need for it more clearly.In addition,Americans may need to place a p value on cooperation on a national scale to achieve important national objectives. The American idea of the national good has never been based on national cooperation but rather on the freedom of the individual, maintaining those conditions that provide the greatest freedom and prosperity for the individual . It is far more difficult for Americans to accept shared sacrifice for the common good and wellbeing of the entire country. For example ,although the majority of Americans believe that it is extremely important to balance the national budget and reduce the deficit, they do not want to see cuts in government programs that benefit them personally.The American value of competition also hinders the development of a spirit of national cooperation. Competition sometimes encourages feelings of suspicion rather than the mutual trust that is necessary for successful national cooperation.Although Americans often cooperate successfully on the local level—in neighborhood groups and churches, for example, on the national level, they may see themselves as part of an interest group that is competing with other interest groups for government funds. A request by the national government for shared sacrifice may be seen as coercive and destructive rather than voluntary and constructive. However, the demands for the 21st century may compel Americans to place a greater value on national cooperation to solve problems that affect them all, directly and indirectly.

The best TITLE of this passage could be ().

A．Which is Better, New Value or Old Value

B．Conservation vs. Need for Jobs

C．The Need for New National Values

D．Cooperation and Competition

关于结核病病因和发病机制的叙述，下列错误的是()

A．结合杆菌属于分支杆菌

B．Ⅱ型变态反应

C．结核病的免疫主要是细胞免疫

D．呼吸道为主要传播途径

E．以上都不是

根据玻尔的氢原子理论，下列说法中错误的是（　　）

A．氢原子的轨道是不连续的

B．氢原子具有的稳定能量状态称为定态

C．氢原子在辐射光的同时能量也在减小

D．用任何光照射氢原子都可以使其发生跃迁

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