[tex=20.071x1.357]aQ9vPf4qRYtUqSxLKhe3/3vZ500wuvtoO9wRtVbZl4aHyvvT0N+X1cJvdjHf8yVWRqAkSKU5yjP9lhIg+0XvX883DM4OEL/oXZVIYQH4Qzgt64LFOXIjFpKyHG/TZjIr[/tex]用列元素法表示关系R