室间隔缺损的超声表现错误的是A．二维超声可见室间隔回声中断 B．二维超声可见缺损断端

骨骼摄影距离最佳选择是（）

A.150cm

B.100cm

C.80cm

D.60cm

E.50cm

对于矿山、建筑施工和危险物品生产、经营、储存单位以外的其他生产经营单位，其从业人员在300人以下的，下列叙述中正确的是( )。

A．必须设置安全生产管理机构

B．必须配备专职安全生产管理人员

C．必须设置安全生产管理机构或者配备专职安全生产管理人员

D．可以不设置专门机构，但应当配备专职或者兼职的管理人员，或者委托具有国家规定的相关专业技术资格的工程技术人员提供安全生产管理服务

逮捕条件中“有证据证明有犯罪事实”是指同时具备下列哪些情形？（ ）（2011年卷二多选第67题）

A．有证据证明犯罪事实已经发生

B．有证据证明的犯罪事实应当是主要犯罪事实

C．有证据证明犯罪事实是犯罪嫌疑人实施的

D．证明犯罪嫌疑人实施犯罪的证据已有查证属实的

静脉麻醉药硫喷妥钠通过下列哪项作用影响突触的传导（）。

A.增强甘氨酸的抑制作用

B.减弱甘氨酸的抑制作用

C.增强GABA的抑制作用

D.减弱GABA的抑制作用

E.对甘氨酸和GABA都无影响

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.