基础写作.上 Last week，we did a survey among 1600 students about how to get along well with others.Most students believe that honesty plays the most important part.Besides，in order to m.
地基与基础的计算题 谁知道。 密度=190/(2*50)=1.9含水率=(190-150)/150=0.367孔隙比e=Vv/v=((190-150)/1)/(2*50)=0.4
问一道全概率的基础题 P(A1)=P(1人击中)=0.4*（1-0.5）(1-0.7)+(1-0.4)*0.5*(1-0.7)+(1-0.4)(1-0.5)*0.7=0.06+0.09+0.21=0.36.
