胰头肿瘤病人，临床上常在其右上腹触及肿块，超声认为该肿块大多为（） A.胰头肿块 B

齿轮减速箱所用的润滑油按厂家要求定期更换（）

For me, scientific knowledge is divided into mathematical sciences, natural sciences or sciences dealing with the natural world (physical and biological sciences), and sciences dealing with mankind (psychology, sociology, all the sciences of cultural achievements. every kind of historical knowledge).

Apart from these sciences is philosophy, about which we will talk later. In the first place, all this is pure or theoretical knowledge, sought only for the purpose of understanding, in order to fulfill the need to understand that is intrinsic and con-substantial to man. What distinguishes man from animals is that he knows and needs to know. If man did not know that the world existed, and that the world was of a certain kind, that he was in the world and that he himself was of a certain kind, he wouldn’t be man. The technical aspects or applications of knowledge are equally necessary for man and are of the greatest importance, because they also contribute to defining him as man and permit him to pursue a life increasingly more truly human.

But even while enjoying the results of technical progress, man must defend the primacy and autonomy of pure knowledge. Knowledge sought directly for its practical applications will have immediate and foreseeable success, but not the kind of important result whose revolutionary scope is for the most part unforeseen, except by the imagination of the Utopians. Let me recall a well-known example. If the Greek mathematicians had not applied themselves to the investigation of conic section zealously and without the least suspicion that it might someday be useful, it would not have been possible centuries later to navigate far from shore. The first men to study the nature of electricity could not imagine that their experiments, carried on because of mere intellectual curiosity, would eventually lead to modern electrical technology, without which we can scarcely conceive of contemporary life.

Pure knowledge is valuable for its own sake, because the human spirit cannot resign itself to ignorance. Butt in addition, it is the foundation for practical results that would not have been reached if this knowledge had not been sought disinterestedly.

Notes: intrinsic 固有的。con-substantial 同体的。autonomy 自主性。zealously and without the least suspicion热情地并丝毫也没有想到。for the most part 大部分，主要地。Utopian乌托邦，理想主义。disinterestedly 不偏不倚地。resign oneself to 听任，顺从。

The author does not include among the sciences the study of（）

A. literature

B.chemistry

C. astronomy

D. anthropology

处理改革、发展、稳定关系的重要结合点是( )。

A．不断改善人民生活

B．不断增强综合国力

C．不断培养高素质科技人才

D．不断推进经济建设

手指交叠时，右拇指叠上为显性（R），左拇指叠上为隐性（r）。短食指基因为TS，长食指基因为TL，此性状的体现还受性激素的影响，TS在男性为显性，TL在女性为显性。R/r与TS/TL两对等位基因分别位于两对常染色体上。一对夫妇均为右拇指叠上、短食指，生有左拇指叠上、长食指的女儿和右拇指叠上、短食指的儿子。则该夫妇再生一个孩子是右拇指叠上、长食指女儿的概率为（）

A.1/16

B.3/16

C.3/8

D.9/16