(难度：中等)typeof null 返回 object
(难度：中等)typeof null 返回 object
相关考题：
YouaredevelopingaAsp.netwebapplicationthtincludesapanelcontrolthathasIDcontentsection.YouneedtoaddatextBoxcontroltothepanelcontrol.() A.this.RequireControlState（this.LoadControl（typeof（TextBox），null））；B.this.ContentSection.control.add（this.FindControl（ContentSection.ID+asp：TextBox））；C.this.ContentSection.control.add（this.LoadControl（typeof（TextBox），null））；D.this.LoadComplete（asp：TextBox）.IntiantiateIn（ContentSection）
Javascript中, 以下代码运行后变量y的值是：（） var x = [‘abcde’ , 123456]; var y = typeof typeof x[1];A、"function"B、"object"C、"number"D、"string"
Javascript中，以下代码运行后变量y的值是：（） var x = [typeof x, typeof y][1]; var y = typeof typeof x;A、"number"B、"string"C、"undefined"D、"object"
public class X { public object m （） { object o = new float （3.14F）； object oa = new object [1]； oa[0]= o； o = null； oa[0] = null； return o； } } When is the float object created in line 3， eligible for garbage collection？（） A、 Just after line 5.B、 Just after line 6.C、 Just after line 7.D、 Just after line 8（that is， as the method returns）.
You are developing a Asp.net web application tht includes a panel control that has ID contentsection.You need to add a textBox control to the panel control.（）A、this.RequireControlState（this.LoadControl（typeof（TextBox），null））；B、this.ContentSection.control.add（this.FindControl（ContentSection.ID + "asp：TextBox"））；C、this.ContentSection.control.add（this.LoadControl（typeof（TextBox），null））；D、this.LoadComplete（"asp：TextBox"）.IntiantiateIn（Content Section）
单选题public class X { public object m （） { object o = new float （3.14F）； object oa = new object [1]； oa[0]= o； o = null； oa[0] = null； return o； } } When is the float object created in line 3， eligible for garbage collection？（）A Just after line 5.B Just after line 6.C Just after line 7.D Just after line 8（that is， as the method returns）.
单选题public class X { public object m （） { object o = new float （3.14F）； object oa = new object [1]； oa[0]= o； o = null； oa[0] = null； return o； } } When is the float object created in line 3， eligible for garbage collection？（）A Just after line 5.B Just after line 6.C Just after line 7.D Just after line 8（that is， as the method returns）.
单选题public class X { public object m （） { object o = new float （3.14F）； object oa = new object [1]； oa[0]= o； o = null； oa[0] = null； return o； } } When is the float object created in line 3， eligible for garbage collection？（）A Just after line 5.B Just after line 6.C Just after line 7.D Just after line 8（that is， as the method returns）.
单选题You are developing a Asp.net web application tht includes a panel control that has ID contentsection.You need to add a textBox control to the panel control.（）Athis.RequireControlState（this.LoadControl（typeof（TextBox），null））；Bthis.ContentSection.control.add（this.FindControl（ContentSection.ID + asp：TextBox））；Cthis.ContentSection.control.add（this.LoadControl（typeof（TextBox），null））；Dthis.LoadComplete（asp：TextBox）.IntiantiateIn（Content Section）
单选题You are developing a Asp.net web application tht includes a panel control that has ID contentsection.You need to add a textBox control to the panel control.（）Athis.RequireControlState（this.LoadControl（typeof（TextBox），null））；Bthis.ContentSection.control.add（this.FindControl（ContentSection.ID + asp：TextBox））；Cthis.ContentSection.control.add（this.LoadControl（typeof（TextBox），null））；Dthis.LoadComplete（asp：TextBox）.IntiantiateIn（Content Section）
单选题public class X { public object m （） { object o = new float （3.14F）； object oa = new object [1]； oa[0]= o； o = null； oa[0] = null； return o； } } When is the float object created in line 3， eligible for garbage collection？（）A Just after line 5.B Just after line 6.C Just after line 7.D Just after line 8（that is， as the method returns）.
单选题You are developing a Asp.net web application tht includes a panel control that has ID contentsection.You need to add a textBox control to the panel control.（）Athis.RequireControlState（this.LoadControl（typeof（TextBox），null））；Bthis.ContentSection.control.add（this.FindControl（ContentSection.ID + asp：TextBox））；Cthis.ContentSection.control.add（this.LoadControl（typeof（TextBox），null））；Dthis.LoadComplete（asp：TextBox）.IntiantiateIn（Content Section）
( 难度：中等)请选择结果为真的表达式：（）A.null instanceof ObjectB.null === undefinedC.null == undefinedD.NaN == NaN
( 难度：中等)[typeof null, null instanceof Object]这些类型的结果是（ ）A.["object", false]B.[null, false]C.["object", true]D.other
(难度：中等)Math.random()返回 0（不包括） 至 1（不包括） 之间的随机数