氨茶碱平喘作用的主要机制是A．促进内源性儿茶酚胺类物质释放 B．抑制磷酸二酯酶活性

A Sports体育运动
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.

（15分）阿司匹林()是应用最早、最广和最普通的解热镇痛药。科学家通过乙二醇把阿斯匹林连接在高聚物F上，制成缓释长效阿斯匹林（）。

高聚物F的合成路线如下：

（1）阿司匹林中含有的官能团名称                  。

（2）A的名称为               B的结构简式为_____________ 。

（3）阿斯匹林连接在高分子载体上的有机反应类型是                ； D→E的反应类型是            。

（4）写出B→C反应的化学方程式：___________________                              ；

写出E→F反应的化学方程式：___________________                              。

（5）阿司匹林可由水杨酸（C₇H₆O₃）跟乙酸酐在催化剂作用下生成，满足以下条件的水杨酸的同分异构体有多种，写出其中任一种的结构简式                                      。

①分子中有苯环；②能发生银镜反应；③苯环上的一硝基取代物有2种。

倒推成本法计算的基本类型是（）。

A.以材料购进、产品完工为记账时点

B.以材料购进、产品出售为记账时点

C.以材料购进为记账时点

D.以产品完工为记账时点

1492年，（）国王资助率船队横渡大西洋到达北美洲。

A.麦哲伦

B.达伽马

C.哥伦布

D.迪亚士

以下不属于盖髓剂的是（）

A.氧化锌丁香油酚粘固剂

B.氢氧化钙制剂

C.抗生素+激素

D.玻璃离子水门汀

E.Dycal