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【简答题】
设A、B为H阶方阵，E为n阶单元矩阵，证明：若E—AB可逆，则E—BA也可逆．
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【单选题】Young people often feels that the age of eighteen is the ______.
A.
best time of life
B.
right age to get married
C.
hardest part of life
D.
gateway to happiness
【简答题】A. contain B. retain C. interact D. minimus 7. In large classes, children feel that they cannot _____ with the teacher. 8. It's increasingly difficult to recruit and ______ good staff. 9. Ei...
【单选题】Eighteen is the ________________ voting age in our contry.
A.
competent
B.
minimal
C.
minimum
D.
matimum
【单选题】在-10°C、101.325kPa下,1mol水凝结成冰的过程中,适用的公式是( )。
A.
ΔU=TΔS
B.
ΔG=ΔH-TΔS
C.
ΔH=TΔS+VΔp
D.
ΔG=0
【单选题】The passage tells us that the most probable reason for the death of the mice in Ader's experiment was that______.
A.
the sweetener was poisonous to them
B.
their immune systems had been altered by the mind
C.
they had been weakened physically by the saccharin
D.
they had taken too much sweetener during earlier conditioning
【单选题】在 -10℃、101.325kPa下，1mol水凝结成冰的过程中，下列哪个公式仍适用
A.
∆U = T∆S
B.
∆S = (∆H- ∆G)/T
C.
∆H = T∆S + V∆p
D.
∆GT,p = 0
【单选题】The passage tells us that the most probable reason for the death of the mice in Ader's experiment was that ______.
A.
they had been weakened psychologically by the saccharin
B.
the sweetener was poisonous to them
C.
their immune systems had been altered by the mind
D.
they had taken too much sweetener during earlier conditioning
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