问题
多项选择题
在多层数据流图中，把（）分开，便于表达与理解整个信息系统。
A.操作数据流图
B.底层数据流图
C.决策数据流图
D.顶层数据流图
答案
参考答案：B, D
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在多层数据流图中，把（）分开，便于表达与理解整个信息系统。
A.操作数据流图
B.底层数据流图
C.决策数据流图
D.顶层数据流图
参考答案：B, D
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| 1 boys and girls 2 the U.K. are wearing 3 kind (种类) of clothes and have 4 hair, so it is not 5 to know whether (是否) they are boys or girls. It's a 6 day. After supper 7 old man goes out for a walk near the river in a park in London. When he is tired, he sits down on a chair to rest and there are some persons (人) on it. Just then, he sees a child standing beside a tree far from them." 8 ,"the old man says to a person with long hair on the same chair," 9 you see the child with long hair and in a blue coat? Is it a boy or a girl?" "A girl,"says the person on the chair, "She is my daughter." "Oh! "the old man says," 10 , I don't know you are her mother." "No," says the person,"I'm her father." | ||||
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