![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
变量menuItem1引用一个菜单项对象,为隐藏该菜单项,应进行何种操作?
A.menuItem 1.Visible=false
B. menuItem 1.Enabled=false
C. menuItem 1.Text=""
D. menuItem 1.Checked=false
查看答案
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.menuItem 1.Visible=false
B. menuItem 1.Enabled=false
C. menuItem 1.Text=""
D. menuItem 1.Checked=false
A.openfiledialog1.show();
B. openfiledialog1.showdialog();
C. openfiledialog1.open();
D. openfiledialog1.openandshow();
通常拷贝构造函数的参数是
A.某个对象名
B.某个对象的成员名
C.某个对象的引用名
D.某个对象的指针名
B.A["Name"]="a"
C.A(Name)="a"
D.A{"Name"}="a"
A.正确
B.错误
A.ListBox1.Items[ListBox1.SelectedIndex-1]
B.ListBox1.Items[ListBox1.SelectedIndex]
C.ListBox1.Items[ListBox1.Items.Count-1]
D.ListBox1.Items[ListBox1.Items.Count]