【判断题】创业机会的特征是吸引力、持久性和适时性,并且伴随着可以为购买者或者使用者创造或增加使用价值的产品和服务。
【单选题】She was sent a box of chocolates along with a letter saying she was fired.( )
【单选题】She wrote back to him ________ she received his letter.
【单选题】若信号量的当前值为-4,则表示系统中在该信号量上有( )个进程等待。
【简答题】A. help B. nest C. letter D. she
【多选题】目前的广告媒体一般分为 ( ) 三大类。 A 触觉媒体 B 视觉媒体 C 感觉媒体 D 视听两用媒体 E c