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【单选题】
下列关于两独立样本均数比较的 检验的说法错误的是
A.
适用于正态分布资料
B.
要求资料总体方差相等
C.
适用于定性资料
D.
自由度为 n 1 + n 2 -2
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【单选题】Who knows the way her home? [     ]
A.
about
B.
on
C.
near
D.
at
【单选题】目标规划的目标权系数是定量的概念,数值(),表示该目标越重要。
A.
越大
B.
越小
C.
为0
D.
为负
【单选题】Who knows the restaurant?
A.
Emi
B.
Ana
C.
Enrico
【单选题】It can be inferred from the passage that a person who knows only his own side of an issue is regarded by the author as ______.
A.
uniformed
B.
opinionated
C.
ignorant
D.
rational
【判断题】一对齿轮啮合的中心距稍增大后,其传动比不变;但因两齿轮节圆半径随之增大,啮合角会减小。
A.
正确
B.
错误
【单选题】Who knows the answer?
A.
S+V+C
B.
S+V+O
【单选题】Who knows better than your customers where your operations can be improved? Today, progressive firms increasingly rely on advisory councils to suggest improvements, recommend action, and offer feedbac...
A.
Because they can influence business operations
B.
because business improvements depend on communication with them
C.
Because they are heavily relied on by prosperous companies
D.
Because goals and objectives are set out by them
【判断题】一对齿轮啮合的中心距稍增大后,其传动比不变。
A.
正确
B.
错误
【简答题】阅读理解。 Dear readers, Imagine a little girl who knows there will not be enough food for dinner, who can't fill her stomach with water because it's polluted (被污染), and who has watched life slip away (消失)...
【判断题】目标规划问题中,权系数是定量的概念,数值越大,表示该目标越重要。
A.
正确
B.
错误
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