--- _________ are the books and the sweaters? ---They are 130 yuan.
A:How many
B:How much
C:How old
D:How long
13-4=____ 8+9=____ 18-9=____ 16-9=____
16-8=____ 12-5=____ 11-6=____ 14-6=____
维护正义也就是维护社会的规则和秩序,是每一个社会成员的法律义务。( )