某医师调查得10名女中学生体重X (kg)与肺活量Y(L)，经直线回归_爱下问搜题

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问题单项选择题

某医师调查得10名女中学生体重X (kg)与肺活量Y(L)，经直线回归分析知，b=0.0748，若t_b＞t(0.05，8)，按α=0.05水准，可认为

A．肺活量与体重大小无关
B．肺活量随体重增加而增加
C．体重与肺活量问有函数关系存在
D．体重与肺活量均值差别有统计学意义
E．体重与肺活量间无线性相关关系存在

答案

参考答案：B

阅读理解与欣赏

开心阅读小天地。

大海

大海，大海，像个摇篮。

　　　　　　　摇过去，白帆点点，摇过来，鱼虾满船。

大海，大海，多大多宽！

　　瞧，太阳月亮，也睡在里边。

1．填一填。

大海像个________。大海里有________、________。

2．太阳月亮怎么会睡在大海里边？

________________________________________________________________

完形填空

“Sixteen,” I said. I have forgotten the math question my second-grade teacher, Joyce Cooper, asked that day, but I will never forget my   36  . As soon as the number left my mouth, the whole class started 37  . I felt like the   38  person in the world..
Mrs. Cooper fixed them with a firm look. Then she said: “We’re all here to 39 .”
Once Mrs. Cooper asked us to write a 40 about what we hoped to do in the future. I wrote: “I want to be a 41 like Mrs. Cooper.
She wrote on my report, “You would 42 an outstanding teacher 43  you are determined and you try hard.” I was to carry those 44 in my heart for the 27 years.
After I graduated from high school, I got married and had children.
We needed every penny just to 45 . College and teaching were out of the question.
Then one day I thought of my 46 of how I wanted to help children. I talked it over with my family and 47  to attend college classes in the 48 before work. And when I got home from work, I would 49 . Finally, after seven years, my dream had been realized and I became a teacher.
Not long after I started 50 , something happened that brought the 51 rushing back to me. I had written a sentence with grammatical errors on the blackboard. Then I asked students to come and 52 the mistakes.
One girl got halfway through, became 53 and stopped. As the other children laughed, 54 rolled down her cheeks. I gave her a hug and told her to have a drink of water. Then, remembering Mrs. Cooper, I fixed 55 of the class with a firm look. “We are all here to learn,” I said.

C．least amusing

D．most important