【单选题】把P25,P50,P7标在一个数轴上,则( )
【单选题】肝瘀血
A.
肝轻度肿大,表面光滑,边缘钝,质稍韧,有压痛
B.
肝明显肿大,表面光滑,边缘园钝,质韧,有压痛,肝-颈静脉回流阳性
C.
早期肝肿大,晚期缩小,质较硬,表面可触到小结节,无压痛
D.
肝逐渐增大,质地坚硬,表面高低不平,有大小不等结节,边缘不整
【简答题】设离散型随机变量 的分布列P( = )=ak,k=1,2,3,4,5. (1)求常数a的值; (2)求P( ≥ ); (3)求P( < < ).
【单选题】The demand function is described by the equation q(p) = 190- p/5. The inverse demand function is described by: