试证明公式是重言式[br][/br]②[tex=5.571x1.357]iVnT+KUkq/blvWpyrS10qle8TBG1MFo9a7JtNtFBKeFhRj8KY7KATSDjPxcnXHYf[/tex]
试证明公式是重言式[br][/br]②[tex=5.571x1.357]iVnT+KUkq/blvWpyrS10qle8TBG1MFo9a7JtNtFBKeFhRj8KY7KATSDjPxcnXHYf[/tex]
1