【多选题】Let S, T, and U be subspaces of a vector space V. Then which of the following equations hold.
C.
S ∩ (T ∩ U)=(S ∩ T) ∩ U
D.
S+(T ∩ U)=(S+T) ∩ (S+U)
E.
dim S + dim T = dim (S ∩T)+dim (S+T)
【单选题】Humans still hold on to the absurd ______ that we are the only intelligent beings in the Universe.
【单选题】患者女,52岁,宫颈癌IIb期,拟行手术治疗。术前行子宫动脉栓塞化疗术,注入顺铂。术后穿刺点加压包扎的时间是 ( ) A、12小时 B、24小时 C、6小时 D、3小时 E、10小时