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【单选题】
分析测定中的偶然误差,就统计规律来讲,以下不符合的是A.
数值固定不变
B.
数值随机可变
C.
大误差出现的概率小，小误差出现的概率大
D.
数值相等的正、负误差出现的概率相等
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【简答题】简述BPR的含义。
【简答题】You are going to high school , aren’t you ? Maybe you don’t know what to do . Here is a list of the top six things to do when you are in high school . These things will give you ideas of what your hi...
【简答题】设有向量组(Ⅰ)：α 1 ，α 2 ，α 3 ；(Ⅱ)：α 1 ，α 2 ，α 3 ，α 4 ；(Ⅲ)：α 1 ，α 2 ，α 3 ，α 5 .如果各向量组的秩分别为r(Ⅰ)=r(Ⅱ)=3，r(Ⅲ)=4.证明：向量组(Ⅳ)：α 1 ，α 2 ，α 3 ，α 5 -α 4 的秩为4.
【简答题】What should you do if you don't like the food?
【单选题】What was the matter with you this morning? You looked______you hadn't slept for the last twenty-four hours.
A.
so as
B.
that
C.
as if
D.
like that
【单选题】_____ you are supposed to do _____ you don’t like a thing is changing it．Don’t complain．
A.
That; what
B.
When; that
C.
What; since
D.
What; when
【单选题】_____is widely known that you value more what you haven’t rather than what you have .
A.
As
B.
What
C.
It
D.
Which
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