应用超声羊水指数诊断羊水过少的标准是：（）  A．3 cm B．5 cm C．8

车辆因故障必须在高速公路停车时，应在车后方多少米以外设置故障警告标志？

A、25
B、150
C、100
D、50

One’s style of the dress reveals the human obsession with both novelty and tradition. People use clothing to declare their membership in a particular social group; however, the rules for what is acceptable dress for that group may change. In affluent societies, this changing of the rules is the driving force behind fashions. By keeping up with fashions, that is, by changing their clothing style frequently but simultaneously, members of a group both satisfy their desire for novelty and obey the rules, thus demonstrating their membership in the group.　　There are some interesting variations regarding individual status. Some people, particularly in the West, consider themselves of such high status that they do not need to display it with their clothing. For example, many wealthy people in the entertainment industry appear in very casual clothes, such as the worn jeans and work boots of a manual laborer. However, it is likely that a subtle but important signal, such as an expensive wristwatch, will prevail over the message of the casual dress. Such an inverted status display is most likely to occur where the person’s high status is conveyed in ways other than with clothing, such as having a famous face.

According to the author, fashions serve all the following purposes EXCEPT

A．satisfying an interest in novelty

B．signaling a change in personal beliefs

C．displaying membership in a social group

D．following traditional rules

男，55岁。主诉左下后牙嵌塞食物，有时遇冷热刺激敏感。检查：龋，去腐后未见穿髓，拟做成远中洞充填，制洞时邻面部分应设计的主要固位形是（）。

A．侧壁固位

B．牙本质钉固位

C．倒凹固位

D．梯形固位

E．鸠尾固位

人的Corti器上有________排内毛细胞和________排及以上外毛细胞。

下列不是生命神圣论的局限性的是（）

A.有阶级性

B.有历史性

C.影响卫生资源的分配

D.只偏重于人口的数量

E.不能把人的自然素质同生命存在的价值相统一