About20ofthepassengerswhowereinjuredinaplanecrasharesaidtobein_____condition.
Thepoorcountriesareextremely_______tointernationaleconomicfluctuations
求曲线y=x^2与直线y=0,x=1所围成的平面图形绕x轴旋转一周所得旋转体的体积V.
二维随机变量(X,Y)在D=(x,y)0<y<1-x2上服从均匀分布,求Z1,Z2联合分布。
设数列满足{an}满足a1=0,an+1-2an=1,则a100=()