地下开采缓倾斜煤层的倾角为（）。 ["8°～25°","4°～25°","0°～25°"]
已经平面汇交力系，用几何法求合力R。
罪犯在被交付执行刑罚前，剩余刑期在一年以下的或者未满18周岁的，由看守所代为执行。
具有代表性的西方国家通货膨胀成因理论有（）。 ["需求拉上论","成本推动论","菲利普斯曲线论","结构失调论","国际传导论"]
You are creating a Windows Forms application by using the .NET Framework 3.5. You create a new form in the application.You add a ContextMenuStrip control named dctxMenu to the form. You have a user defined class named CustomControl.You write the following code segment in the application （Line numbers are included for reference only ） CustomControl myControl = new CustomControl（）； You need to ensure that an instance of CustomControl is displayed on the form as a toplevel item of the ctxMenu control. Which code segment should you add？（） ["A","B","C","D"]
什么是多管分层采油？
