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【简答题】
设向量组α 1 ，α 2 ，…，α s (s＞1)中，α 1 ≠0并且α i 不能由α 1 ，α 2 ，…，α r-1 线性表出(i=2，…，s)．求证：向量组α 1 ，α 2 ，…，α s 线性无关．
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反馈参考答案：
举一反三
【单选题】听力原文：(Woman 1) How about going out for lunch today instead of eating in the cafeteria? (Woman2)(A) I agree—they serve good food for lunch. (B) Yes, the cafeteria is open from eleven to two-thirty. (C)...
A.
B.
【简答题】How about coming out with us tomorrow night?______
【单选题】How about going out for dinner this evening?
A.
That's right.
B.
You are welcome.
C.
I'm afraid I can't.
【单选题】5 -How about going out for a walk?-___.
A.
Yes, I will.
B.
Taking a walk is good for us.
C.
Why not?
D.
I'll go out for a walk.
【单选题】患者男，60岁，全身黄疸，粪便呈白陶土色。实验室检查与该病人病情不符的是
A.
血清总胆红素增高
B.
血清结合胆红素增高
C.
结合胆红素与总胆红素比值大于50%
D.
尿胆原阳性
E.
尿胆红素阳性
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