bug fixes

src/pages/student/index.vue

@@ -166,7 +166,7 @@ export default {
         ],
         columns: [
           { type: 'selection', minWidth: '50px', fixed: 'left', visible: this.hasDelete },
-          { prop: 'head_img', label: '图像', slots: 'table_img', minWidth: '80px', fixed: 'left' },
+          { prop: 'head_img', label: '头像', slots: 'table_img', minWidth: '80px', fixed: 'left' },
           { prop: 'student_number', label: '学籍ID', slots: 'table_id', minWidth: '160px', fixed: 'left' },
           { prop: 'country', label: '国家', minWidth: '100px' },
           { prop: 'city', label: '省市', minWidth: '100px' },