什么是高处作业？级别如何划分？

George，Frank，Peter，Betty和Susan正在各自打算去参观一座名塔。请仔细阅读题中的个人情况说明和A到E五座名塔的介绍，选出符合各人要求的最佳选项。

小题1:Susan is a college student. She is on holiday 'in July and would like to visit the tallest tower of     the five below.

小题2:George, a student of history, is ready to write a paper on old towers. He is going to visit one in Europe.

小题3:Betty, a teacher from Australia, likes shopping very much. She is thinking of buying different things for her students.

小题4:Frank, from America, is traveling around the world. His last stop is to visit a tower where he can spend the night.

小题5:Peter is interested in plants and animals. He is now looking for a tower where he can see fish and other water animals.

颈、胸部手术后，在病情许可情况下，体位应为（）。

A.平卧、头转向一侧

B.15°～30°头高脚低斜坡卧位

C.高半坐位卧式

D.低半坐位卧式

E.下肢抬高15°～20°，头部和躯干抬高20°～30°的特殊体位

慢性胰腺炎典型临床表现的五联征是指（）

A.腹痛、胰腺钙化、胰腺假性囊肿、脂肪泻和糖尿病

B.腹痛、胰腺坏死、胰腺假性囊肿、脂肪泻和糖尿病

C.呕吐、胰腺钙化、胰腺假性囊肿、脂肪泻和糖尿病

D.腹痛、黄疸、胰腺假性囊肿、脂肪泻和糖尿病

E.腹痛、胰腺钙化、胰腺脓肿、脂肪泻和糖尿病

公用安全工器具设（），保管人应定期进行日常检查、维护、保养

现金流量表分析的目的是什么？