Physics ______ much harder than English, I think. [ ]
A. are
B. is
C. was
D. were
答案:B
信用政策是企业为对应收账款投资进行规划与控制而确立的基本原则与行为规范,它不包括()
A.信用标准
B.信用期限
C.收账方针
D.信用条件