单项选择题 If a customer decided to pass up the chance of a cash discount of 1% in return for reducing their average payment period from 70 to 30 days, what would be the implied cost in interest per annum？ A、9.0%   B、 9.5%        C、 10%      D、12%

单项选择题 Securities are _____ for the person who buys them, but are _____ for the individual or firm that issues them.

单项选择题 隋唐的敦煌壁画中，______体现山水景物开始成为画面的主体内容，山的造型方式，已经不是图案化的装饰手法，出现了接近于金碧山水的空勾无皴填色法。 A. 敦煌莫高窟420窟的《法华经变》 B. 敦煌莫高窟321窟的《宝雨经变》 C. 敦煌莫高窟103窟的《化城喻品》 D. 敦煌莫高窟320窟的《日想观图》