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单选题

Which will declare the method that forces a subclass to implement it?()

发布日期:2022-06-05

Which will declare the method that forces a subcla...
A

public double methoda ():

B

static void methoda(double d1) {}

C

public native double methoda ():

D

abstract public foid methoda ():

E

protected void methoda (double d1) {}

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