决策树方法由结点和分枝组成,其中用方框“□”代表()结点,表示决策者可控制的;用圆圈“○”代表机会结点,表示决策者无法控制的。
A、根
B、控制
C、决定
D、决策
参考答案:D
我们应履行的义务,就是不做法律所禁止的行为。 [ ]
It is probably easier for teachers than for students to appreciate the reasons why learning English seems to become increasingly difficult once the basic structures and patterns of the language have been understood.