【简答题】When the VMP is bolted directly to the vehicle body end via the outer array of through holes, the elastomeric seal is compressed and provides an automatic environmental seal.
【单选题】已知P(A)=0.3, P(B)=0.6。(1) 若A和B相互独立,则P(A+B)=0.72; (2) 若A和B相互独立,则P(B-A)=0.42;(3) 若A和B互不相容,则P(A+B)=0.9;(4) 若A和B互不相容,则 P(B-A)=0.6。以上事件概率计算结果正确的是
【单选题】The hotel was awful!___, our room was far too small. Then we found that the shower didn't work.
【简答题】若 P(A) = 0.3, P(B) = 0.6, 则: (1) 若 A 和 B 独立,则 P(A+B) = ______, P(B – A) = ______; (2) 若 A 和 B 互不相容,则 P(A+B) = ______, P(B – A) = ______; (3) 若 A ⊂ B,则 P(A+B) = ______, P(B – A) = ______.
【简答题】若p(a)=0.3,p(b)=0.6 (1)若a与b独立,则p(a+b)=_,p(b-a)=_ (2)若a和b互不相容,则p(a+b)=_,p(b-a)=_
【简答题】若P(A)=0.3,P(B)=0.6,则(1)若A和B独立,则P(A+B)=_______,P(B-A)=(2)若A和B互不相容,则P(A+B})=______,P(B-A)=________;
【单选题】该污水处理厂采用反硝化深床滤池的目的是( )
【单选题】若A和B相互独立,P(A)=0.6,P(B)=0.3,则P(B|A)等于
【判断题】硝化细菌和亚硝化细菌是化能异养型微生物。