设X ~B(n, p),且E(X )= 9,D(X )= 3.6,则分布参数n=,p=.
下列各分布中,期望值等于8,方差等于4的是()(A)N (8, 16); (B) B (16, 0.5);(C)π(8);(D)U(6, 10)
The Jurassic Park is _____ Steven Spielberg movie in which _____ hero fights bravely and protects his friends and family from dinosaurs.
A. /;the
B. a;the
C. /;a
D. the;a
Mr. Brown, ______ chairman of the trade union, will visit our factory in _____ month of May.
A. /; the
B. a; the
C. the; /
D. the; the