数据流图的类型有 【3】 和事务型。
参考答案：变换型
解析：典型的数据流图有两种，即变换型和事务型。
Was it on a lonely island _____ he was saved one month after the boat went down?[ ]
A. where
B. that
C. which
D. what
试述放射性核素脑显像前病人必做的准备工作。
