发动机运转数分钟后熄火，用同样的力量踩下踏板数次，踏板的剩余高度应一次比一次降低。
什么时供油提前角和喷油提前角？解释两者的关系以及对柴油机性能的影响。
You are creating a Windows Forms application by using the .Net Framework 3.5 You plan to display detailed help instructions for each control in the form.You create a help file.You configure a HelpProvider component on the form. You need to display the help file for the control that is focused when the F1 key is pressed. Which method of the HelpProvider class should you call for each control？（） ["SetShowHelp","SetHelpString","SetHelpKeyword","SetHelpNavigator"]
不动产登记机构应当自受理登记申请之日起（）个工作日内办结不动产登记手续。 ["15","20","30","35"]
行为忠诚是忠诚的高级阶段。
临界pv值
