单选题Which will declare the method that forces a subclass to implement it?()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) {}

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