olga wants to have one action on the video form that will give the options to print ,save and exit the document when it is clicked .how can she accomplish this?()
A. use an action with subactions
B. layer the actions in the action menu
C. Use action buttons within an outline control in a hidden frame to present "twisties "
D. use hide/when formulas along with a database profile field setting to display "toolbars" of ico
用尿糖定性试验检查糖尿病病人和正常成年人各500名,结果糖尿病病人中有300例阳性,200例阴性,正常成年人有50例阳性,450例阴性尿糖定性试验筛检糖尿病的灵敏度为()。
A. 200/500×100/100=40%
B. 300/500×100/100=60%
C. 50/500×100/100=10%
D. 450/500×100/100=90%
E. 100/500×100/100=20%