系统检修开车后发现WIQ-601没有指示，如何处理？
题型：问答题 简答题
问题：
系统检修开车后发现WIQ-601没有指示，如何处理？
题型：问答题 简答题
| 根据短文完成下列所缺的内容。 |
| Betty and Henry are the parents of Sally, Linda and Tom. Linda is single (单身的). Sally is married (已婚的). Her husband's name is Jack. Sally and Jack are the parents of Jimmy and Sarah. Jimmy is their son, and Sarah is their daughter. Tom is also married. His wife's name is Patty. Patty and Tom are the parents of Julie and Kevin. Julie is their daughter, and Kevin is their son. Jimmy, Sarah, Julie and Kevin are cousins. They are also the grandchildren of Betty and Henry. |
1. A " family tree " is _____. |