题目内容
(请给出正确答案)
[主观题]
The government is trying to do something to__________ better understanding between the two
countfies.
A.raise
B.promote
C.heighten
D.increase
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A.raise
B.promote
C.heighten
D.increase
设有有限阶矩阵A,B,C,S等,证明:
det(AB)=detA·detB,det(S-1AS)=detA.
tr(AB)=tr(BA),tr(S-1AS)=trA,
tr(ABC)=tr(CAB)=tr(BCA).
A.TR范围约30-1500MS
B.在SE序列中长TR用于T2或质子加权
C.短TR可显示T.1对比
D.场强
E.通常大多数组织TR值为400-600Ms