【单选题】变量openFileDialog1引用一个OpenFileDialog对象.为检查用户在退出对话框时时否点击了'打开'按钮,应检查openFileDialog 1.ShowDialog()的返回值是否等于()
【多选题】下列选项中会对金属热处理过程产生影响的是
【简答题】During an experiment with drosophila, it was discovered that all females had red eyes. A conclusion based on this observation would be:
【单选题】现代意义上的班级划分标准则是( )和以学生发展为本的价值追求的反映。
【单选题】现代意义上的班级划分标准是( )和以学生发展为本的价值追求的反映。
【单选题】若有一个打开文件对话框对象openfiledialog1,则打开该对话框的正确代码是( )。
A.
openfiledialog1.show();
B.
openfiledialog1.showdialog();
C.
openfiledialog1.open();
D.
openfiledialog1.openandshow();
【单选题】下列设置打开文件对话框OpenFileDialog1的Filter属性正确的是_________。
A.
OpenFileDialog1.Filter=Pictures(*.Bmp)|*.Bmp
B.
OpenFileDialog1.Filter=["Pictures(*.Bmp)"|"*.Bmp"]
C.
OpenFileDialog1.Filter="Pictures(*.Bmp)|*.Bmp"
D.
OpenFileDialog1.Filter={Pictures(*.Bmp)|*.Bmp}
E.
OpenFileDialog1.Filter=(Pictures(*.Bmp)|*.Bmp)
【单选题】以下正确的语句是____。 A.OpenFileDialog1.Filter=AllFiles|*.*|Pictures(*.Bmp)|*.Bmp B.OpenFileDialog1.Filter="AllFiles"|"*.*"|"Pictures(*.Bmp)"|"*.Bmp" C.OpenFileDialog1.Filter="AllFiles|*.*|Pictures(*.Bmp)|*.B...