下列各式-1/5a²b²,1/2x-1,-25,x-y/2,a²-2ab+b²中单项式的个数有()个
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下列各式-1/5a²b²,1/2x-1,-25,x-y/2,a²-2ab+b²中单项式的个数有()个
下列各式-1/5a²b²,1/2x-1,-25,x-y/2,a²-2ab+b²中单项式的个数有()个
下列各式-1/5a²b²,1/2x-1,-25,x-y/2,a²-2ab+b²中单项式的个数有()个
列各式-1/5a²b²,1/2x-1,-25,x-y/2,a²-2ab+b²中单项式的个数有(3)个