单项选择题
The doctor told Mr. White that he couldn't get better i...
单项选择题The doctor told Mr. White that he couldn't get better if he didn't ____ drinking.( )
Finite difference method is more efficient than finite ...
单项选择题Finite difference method is more efficient than finite element method.( ) A. 对 B. 错
A.见图AB.见图BC.见图CD.见图D