题目内容
(请给出正确答案)
[单选题]
The accident () in the afternoon.
A.take over
B.take place
C.took over
D.took place
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B.take place
C.took over
D.took place
A、party
B、reason
C、instruction
D、stuck
函数X1(t),X2(t),…,Xn(t),在区间a≤x≤b上线性相关,则在[a,b]上它们的伏朗斯基行列式W(t)≠0。()
A.错误
B.正确
A.can’t
B.mustn’t
C.don’t need
D.don’t have to
B.Don't be sorry
C.I don't care at all
D.It doesn't matter
A.(T*F)
B.T*F
C.P↑
D.P↑(T*F)
A.R(t)·F(t)=1
B.R(t)+F(t)=1
C.R(t)-F(t)=1