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平键怎样传递扭矩？用平键联接时，轴上和毂上的键槽深度相同吗？

答案

参考答案：

平键的工作表面是侧面，与轴和毂孔中的键槽侧面接触传递扭矩。

轴上的键槽深度和股上的键槽深度不筒，轴上键槽深度大于毂上键槽深度，以利于提高轴上键槽的强度。

单项选择题 共用题干题

患者，女，52岁。昨晚参加宴会后回家看电视，1小时后觉得右侧头痛与右眼肿胀，视力下降，深夜头痛加剧且眼红，晚上与今晨恶心、腹胀、呕吐3次，右眼视物更不清，下午来急诊。检查：右眼视力为0.05，针孔视力无提高，指测右眼压T2，混合充血+++，角膜雾状浑浊++，前房很浅，瞳孔5.5mm大，椭圆形，对光无反应，未见有后粘连，晶状体前囊下见灰白斑点状浑浊，眼底模糊，可见 * * 充血。左眼视力1.2，除周边前房较浅外未见明显异常。

据患者的体征，做出的判断是（）

A.角膜炎

B.急性虹膜炎

C.年龄相关性白内障

D.虽然有眼病，但左眼视健眼，无需处理

E.急性原发性闭角型青光眼
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问答题

Children in any society are expected to learn to conform to a number of social rules and expectations if they are to become participants in the culture. (46)Among the rules that children in our society are expected to learn are that certain classes of adults (such as teachers and doctors) are addressed by titles, that males and females use separate restroom facilities, and that women but not men wear dresses. These are examples of social conventions. In the absence of such a shared norm, the acts are neither right nor wrong. For this reason, conventions may be said to be arbitrary. For example, (47)we could just as easily have students address teachers by first names as have them call teachers by their last names and formal titles of Mr. or Ms.
Conventions, however, serve an important function by providing predictability and order to social life. (48)Without social conventions it would be impossible to organize social institutions such as schools, and societies as organized systems could not exist. The arbitrariness of conventions makes their importance difficult for children to figure out. (49) It is not until some time in adolescence that children come to fully understand the function that these arbitrary conventions serve to provide predictability and order to our social interactions.
In contrast with issues of convention are matters of morality. Morality refers to issues of human welfare, justice, and rights that are a function of the inherent features of interpersonal relations. Because of this, the right and wrong of moral actions are not simply determined by social consensus or the views of authority. For example, it is not possible to hit another person with force and not hurt the other person. Similarly, it is not possible to steal something valuable from someone else and not cause the person to experience the sense of loss. A moral judgment about unprovoked harm ( "It is wrong to hit") would not be dependent on the existence of a socially agreed upon rule or standard but could be generated solely from the intrinsic effects of the act (i.e., hitting hurts). (50)Similar analyses could be done regarding a broader range of issues that would extend beyond direct harm to concerns for what it means to be just, compassionate, and considerate of the rights of others.
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