A:have told; washe
B:have been told; washe
C:was told; washed
D:have been told; is washed
Last week he borrowed a book from the library. Today he has to return it to the library.
已知A=2x,B是多项式,在计算B+A时,小马虎同学把B+A看成B÷A,结果得x+12,则B+A=____
下列除哪一结构外,其余结构在层次上是一致的( )
孙中山是中国民主革命的先行者,是海峡两岸共同尊崇的伟人。他一生中最突出的功绩是领导了( )