【单选题】【消耗次数：1】
产品单位成本与产品产量之间的关系一般来说是（）
①
函数关系
②
线性关系
③
正相关关系
④
负相关关系
参考答案：
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相关题目
【单选题】
产品产量与单位成本的相关系数是-0.88，单位成本与利润率的相关系数是-0.94，产量与利润之间的相关系数是0.81，因此()。
①
产量与利润的相关程度最高
②
单位成本与利润率的相关程度最高
③
产量与单位成本的相关程度最高
④
看不出哪对变量间的相关程度高
【单选题】
下列关系中，属于正相关关系的有?
①
合理限度内，施肥量和平均单产量之间的关系
②
产品产量与单位产品成本之间的关系
③
商品的流通费用与销售利润之间的关系
④
流通费用率与商品销售量之间的关系
【多选题】
相关关系与函数关系各有不同特点，主要体现在?
①
相关关系是一种不严格的互相依存关系
②
函数关系可以用一个数学表达式精确表达
③
函数关系中各现象均为确定性现象
④
相关关系是现象之间具有随机因素影响的依存关系
⑤
相关关系中现象之间仍可以通过大量观察法来寻求其变化规律
随机题目
【单选题】
_______ the English examination, I would have gone to the concert last Sunday.
①
In spite of
②
But for
③
Because of
④
As for
【单选题】
By the time he was twelve, Edison____ to make a living by himself.
①
would begin
②
has begun
③
had begun
④
was begun
【单选题】
The popular singer who had been praised very highly____ to be a great disappointment.
①
turned in
②
turned out
③
turned up
④
turned down
【单选题】
Mary realized she ____ .
①
is made fun of
②
was making fun of
③
was being made fun of
④
is being made fun of
【单选题】
We often get _______ when people cut in line.
①
annoying
②
annoyed
③
to annoy
④
annoy
【单选题】
_______ the bad storm Tom delivered the newspapers on time.
①
In favor of
②
In spite of
③
In front of
④
In charge of
【单选题】
One of my ____ sentences is: there is no smoke without fire.
①
faithful
②
favorite
③
favorable
④
famous
【单选题】
Theboysspentthewholemorning____ possibleanswerstothequestion.
①
discuss
②
to discuss
③
discussing
④
discussed
【单选题】
Woman: Bob, do you think you can lend me fifty dollars? Bob: Let me see. ____
①
You know I have no money at all.
②
Sorry, I don’t think I have much with me.
③
I don’t think you should do it.
④
Oh, I have quite a lot.