电子头脑风暴法具有很多优点,但也存在不少缺点,下列几项中不属于它的缺点的是() ["效率受规模约束","社会互动减少","权威损失和缺乏赞许","人员参与变少"]
锚的抓重比又称锚的抓力系数,它是指:() ["锚的抓力与链重之比","链的抓力与锚重之比","锚的抓力与锚重之比","锚重与锚的抓力之比"]
商船上普遍采用的船首锚均为无杆锚而船尾有时采用:() ["霍尔锚","海军锚","无杆锚","有杆锚或燕尾锚"]
简述数字产品的特性?
AC-14型锚属于无杆大抓力锚,其锚爪转动角约为:() ["40°","42°","30°","45°"]
简述预期实现需求的一般模型假设条件?