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软件危机出现于10世纪60年代末，为了解决软件危机，人们提出了【1】的原理来设计软件，这就是软件工程诞生的基础。

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在窗体上画两个文本框(其NAME属性分别为TEXT1和TEXT2)和一个命令按钮(其NAME属性为COMMAND1)，然后编写如下事件过程： PRIVATE SUB COMMAND1_CLICK( ) X=0 N=0 DO WHILE X＜50 x=(x+2) * (x+3) N=N+1 LOOP TEXT1=STR(N) TEXT2=STR(X) END SUB程序运行后，单击命令按钮，在两个文本框中显示的值分别为( )。

A. 1和0
B. 2和72
C. 3和50
D. 4和168

查询“准则”是查询或高级筛选中用来识别所需特定记录的【7】。

打开工作簿文件EX12.XLS(内容如下)，将工作表sheet1的A1：C1单元格合并为一个单元格，内容居中；计算“人数”列的“总计”项和“所占比例”列(所占比例=人数/总计，最后一个单元格不计)，将工作表命名为“学生人数情况表”。某中学学生人数情况表年级人数所占比例初一 360 初二 320 初三 290 总计 (2)选取(学生人数情况表)的“年级”列(不含“总计”列)和“所占比例”列，建立“饼图”(系列产生在“列”)，标题为“学生人数年级比例图”，插入到表的A9：F19单元格区域内。

"How are you keeping" "Look (31) yourself. " "Good Health. ""Here’s your health." "Health, wealth and happiness." "If you’re healthy, you’re (32) "It’s amazing how many greetings, wishes and general expressions turn on health. Health is something healthy people hardly ever think about (33) they’re (34) When that happens they think about little else. Then their visits to the doctor, the hospital; if they’re really unwell, medicines, pills, bottles, ointments, injections, having their temperature taken, and the worry (35) expense. Well, (36) least in Britain the last part isn’t too bad under the National Health Service. This is a Government enforced scheme whereby everyone pays in a small percentage of their earnings each week (37) month, and is then entitled to free medical treatment when they are ill. This doesn’t include medicines, which have to be paid (38) , but at a considerably reduced rate.Everybody (39) Britain is advised (40) have a local doctor. When a person moves (41) a district, one of the first things they do is to find a (42) doctor and get on his list or panel. There (43) lists of NHS doctors in the local post offices and everybody has a (44) card. Most British (45) are already registered with a doctor and moving into a new district entails no more than finding a new doctor and transferring (46) his panel.The National Health doctor will treat, and prescribe for, the more usual illnesses. Any cases that are beyond the scope of the local surgery he will (47) to the nearest hospital, Again, in hospital, the (48) is free. The only drawback is that a great many people are in, or attending, hospital (49) that most would-be patients have to go on a waiting list before they can (50) hospital treatment. 43().