利用乘法公式计算:982=( )=( )=( )。
(100-2)×98=100×98-98×2=9604
He was unable to make such progress, _______.
A.as he tried hard
B.as hard he tried
C.so hard did he try
D.hard as he tried
在资产证券化过程中发行的以资产证为基础的证券称为证券化产品。 ( )