A:f﹣1(2)=2
B:f﹣1(2)=4
C:f﹣1(4)=2
D:f﹣1(4)=4
I went to school without ____ (eat) anything this morning.
Jim , can you help me make a shopping list ? I want to go to the s____ .
如果对象A和B都具有相同的属性P,Q,R等,此外已知对象A还有一个属性S,而对象B还有一个未知的属性X,由类比推理,可以得出下列哪个结论可能成立( )