— Come on! You could recite (背诵) the long poem ____ difficulty.
— Thanks. I've learned it _____ heart.
A:with; into
B:with; by
C:without; into
D:without; by
①企业生产规模缩小
②社会总体消费水平下降
③企业盈利能力减弱
④劳动者收入下降
在河南商丘,有一县城与孙中山提出的三民主义有关,它是( )