免疫是机体的一种重要保护性功能，下列各项不属于免疫学应用的是（）
A．接种流感疫苗
B．标记抗体追踪抗原所在部位
C．机体产生抗SARS病毒的抗体清除SARS病毒
D．利用免疫抑制剂提高器官移植成功率
参考答案：C
解析：免疫学应用是人们通过免疫机制，应用与人类，为人类造福。接种流感疫苗可以预防传染病；标记抗体追踪抗原所在部位，是利用了抗原抗体的特异性进行的，有利于人们精准消灭抗原；利用免疫抑制剂提高器官移植成功率，这些都属于免疫学应用。而机体产生抗SARS病毒的抗体清除SARS病毒，这是机体的正常免疫反应，不属于免疫学应用。C错。故本题选C。考点：本题考查免疫的相关知识，意在考查考生识记理解免疫知识的要点，把握知识间的内在联系的能力。
Passage Four
| Social change is more likely to occur in societies where there is a mixture of different kinds of people than in societies where people are similar in many ways. The simple reason for this is that there are more different ways of looking at things present in the first kind of society. There are more ideas, more disagreements in interest, and more groups and organizations with different beliefs. In addition, there is usually a greater worldly interest and greater tolerance in mixed societies. All these factors tend to promote social change by opening more as of life to decision. In a society where people are quite similar in many ways, there are fewer occasions for people to see the need or the opportunity for change because everything seems to be the same. And although conditions may not be satisfactory, they are at least customary and undisputed. Within a society, social change is also likely to occur more frequently and more readily in the material aspects of the culture than in the non-material, for example, in technology rather than in values; in what has been learned later in life rather than what was learned early; in the less basic and less emotional aspects of society than in their opposite; in the simple elements rather than in the complex ones; in form rather than in substance; and in elements that are acceptable to the culture rather than in strange elements. Furthermore, social change is easier if it is gradual. For example, it comes more readily in human relations on a continuous scale rather than one with violent changes. This is one reason why change has not come more quickly to Black Americans as compared to other American minorities, because of the sharp difference in appearance between them and their white counterparts. |
The following factors tend to promote social change except ______.
A．different kinds of people
B．different points of view
C．different interests
D．different conditions