题目内容
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[主观题]
This was my first experience of working with other people. _______________________________
_______________________________________________
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试证:相互独立的正态过程X(t)与Y(t)的和Z(t)=X(t)+Y(t)仍为正态过程,若已知EX(t)=mX(t),EY(t)=mY(t),D(X(t))=DX(t),D(Y(t))=DY(t)试求E[Z(t)]及D[Z(t)]。
A.finish
B.solve
C.change
D.mop
().Please call me Mary. That's my first name.
A. How are you
B. How shall I address you
C. Are you Mary
A.introduction
B.description
C.speech
D.lecture
A.the;a
B./;an
C.the;an
D.a;the
—________________.
A.I’d like to go there.
B.With my pleasure.
C.First of all . We’d better change our question order.
A.to sit
B.sitting
C.sat
D.sit