汽车悬架一般由（）、导向装臵和减振器三部分组成。

慢性背疼通常是由成疝的或退化的脊椎骨引起的。在大多数的情况下，脊椎骨在慢性疼痛形成之前就已受损。实际上，30岁以上的人中有1/5的人脊椎骨成疝或退化，但并不显示任何慢性症状。在这种情况下，如果后来发生慢性疼痛，一般都是由于缺乏锻炼致使腹部和脊部的肌肉退化而引起的。 上面的陈述，如果正确，最能强有力地支持下面哪一点

A．30岁以上的人中，有4/5的人可以确信他们从来不会患慢性背疼痛。

B．经常锻炼腹部和脊部肌肉的人可以确信不会患慢性背疼痛。

C．病人们在他们的脊椎骨第一次成疝或退化时，很少会遭受到甚至是轻微的和短暂的背疼。

D．存在一个能有效延缓或防止起源于目前无症状的成疝的或退化的脊椎骨的疼痛出现的策略。

钎焊是把( )的钎料金属加热熔化至液态，然后使其渗透到被焊金属接缝的间隙中而达到结合的方法。

A．比被焊金属熔点低

B．比被焊金属熔点高

C．连接处

D．处于低温

结构化设计中应用软件设计是其重要组成部分，它包含许多项内容，下述( )是计算机进行信息处理时最基础性的工作。

A．输出/输入设计

B．存储设计

C．代码设计

D．屏幕设计

Imagine a world in which there was suddenly no emotion—a world in which human beings could feel no love or happiness, no terror or hate. Try to imagine the consequences of such a transformation. People might not be able to stay alive, knowing neither joy nor pleasure, anxiety nor fear, they would be as likely to repeat acts that hurt them as acts that were beneficial. They could not learn, they could not benefit from experience because this emotionless world would lack rewards and punishments. Society would soon disappear, people would be as likely to harm one another as to provide help and support. Human relationships would not exist, in a world without friends or enemies, there could be no marriage, affection among companions, or bonds among members of groups. Society’s economic underpinnings (基础, 支柱) would be destroyed, since earning $10 million would be no more pleasant than earning $10, there would be no incentive to work. In fact, there would be no incentives of any kind. For as we will see, incentives imply a capacity to enjoy them.

In such a world, the chances that the human species would survive are next to zero, because emotions are the basic instrument of our survival and adaptation. Emotions structure the world for us in important ways. As individuals, we categorize objects on the basis of our emotions. True we consider the length, shape, size, or texture, but an object’s physical aspects are less important than what it has done or can do to us—hurt us, surprise us, anger us or make us joyful. We also use categorizations colored by emotions in our families, communities, and overall society. Out of our emotional experiences with objects and events comes a social feeling of agreement that certain things and actions are "good" and others are "bad", and we apply these categories to every aspect of our social life—from what foods we eat and what clothes we wear to how we keep promises and which people our group will accept. In fact, society exploits our emotional reactions and attitudes, such as loyalty, morality, pride, shame, guilt, fear and greed, in order to maintain itself. It gives high rewards to individuals who perform important tasks such as surgery, makes heroes out of individuals for unusual or dangerous achievements such as flying fighter planes in a war, and uses the legal and penal system to make people afraid to engage in antisocial acts.

The emotional aspects of an object are more important than its physical aspects in that they ().

A. help society exploit its members for profit

B. encourage us to perform important tasks

C. help to perfect the legal and penal system

D. help us adapt our behavior to the world surrounding us

在普通话辅音系统中，双唇送气清塞音是（）（用国际音标书写）。