去分母得:-x+4>0,
解得:x<4.
则非负整数解为0,1,2,3.
Don't get _____ about the dress----- there's only a little mud spot on it.[ ]
A. curious
B. upset
C. excited
D. doubtful
简明地概括,可认为BSP产品和资源的生命周期的个阶段中,开发一种产品或服务应属于以下哪个阶段
A.获取
B.需求
C.经营
D.回收