图 1.
MTY0NjhDNkNBNThDQ0U5LM0I0N0ZCMjM5NThGRCo0rNSMxMDY0MUM5NEJGRjAxCNDFGODA5NjE4RkVEMEM0XRUMyNEZFNDYxQUE2RDgweQkNDREMyQ0RDQTUzQjM0hOTBEMkUxMzIyMEIxRjcwVQTYyQ0NFNEMg