情感忠诚是忠诚的第一阶段。
处理拒爆、残爆工作必须在（）亲自指导下进行。 矿长。 总工。 队长。 班组长。
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。
临界pv值
只有过水断面上各点流速相等的流动才是均匀流。（）
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？（）
