关于 * * 情况，下列描述正确的是（）。 A.月经前 * * 细胞呈高度角化 B.为估计激素水

哪些是产生压力的因素（）。

A.心理因素

B.生物因素

C.生理因素

D.化学因素

E.物理因素

分离性障碍的临床症状下列哪条不能出现（）。

A.情感爆发

B.意识障碍

C.可有失明症状

D.运动感觉障碍

E.智能全面减退

Many animals engage in play，but homo sapiens is the only animal (1) have invented sports.Since sports are an invention，a part of culture (2) than an aspect of nature，all definitions of sports are somewhat arbitrary. (3) sports are a human universal found in every known culture or a (4) unique to modern society depends upon one’s definition of sports.Men and (5) have always run，jumped，climbed，lifted，thrown， and wrestled，but they have (6) always performed these physical activities competitively. Although all literate societies seem to (7) contests of one sort or another in which men， and sometimes women， (8) in displays and tests of physical skill and prowess，sports may be (9) defined as physical contests performed for their own sake and not for (10) ulterior end.According to this strict definition，neither Neolithic hunters nor contestants (11) religious ceremonies such as the ancient Olympic Games were engaged in sports. (12) on the stipulation that sports must be performed for their own sake (13) the paradoxical elimination of many activities which are usually thought of as (14) ，such as exercises done for the sake of cardiovascular fitness，races run (15) satisfy a physical education requirement，ball games played to earn a paycheck. (16) definition also means abandonment of the traditional usage in which"sport，"derived (17) Middle English disporter，refers to any light hearted recreational activity.In the. (18) of some 18th- century aristocrats，a game of backgammon and the seduction of (19) milkmaid were both considered good sport，but this usage of the term (20) become archaic.

铜矿石或铜精矿生产铜的方法概括起来有（）和（）两大类。

试述可编程序控制器的基本结构及各部分的作用。