observable

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observable

1.java.util包中的Observable类相当于观察者模式中的（）。2.java.util.Observable中的（）方法用来设置一个内部标志位注明数据发生了变化。3.In spectra of optical absorption or emission, the rotational energy some time is observable as fine structure4.The relative effects of heredity and environment are most clearly observable in （）twins.