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问题 单项选择题

根据20或更多批获得的质控测定结果，对数据进行离群值检验后计算所得的均数()

A．几何平均值

B．算术平均数

C．累积平均数

D．作为质控品有效期内的常规中心线

E．作为质控品有效期内的暂定中心线

答案

参考答案：E

单项选择题

Once a man and his wife worked for an old man. There was a big box in the old man’s living room. The old man pointed to the box and said, "There’s only one thing you (1) do. Don’t open the box. " (2) saying this, he left his home.The woman said to her husband," There must be (3) expensive in the box. Let’s open it, shall we" Her husband said (4) to her. But the woman didn’t give up her (5) . One day, she decided to find out (6) was in it. Her husband didn’t stop her. She opened the box and looked inside. To her surprise, she found nothing in the box. She tried hard to close it, but she (7) That evening the old man came home and found the box was (8) . He was very (9) and asked the woman and her husband to leave his home."But there was nothing in the box," the woman said. "We haven’t taken anything at all. "The old man (10) them, "The box is not important, but I cannot believe you. That’s important!

 

第（4）空应选择（）

A．no

B．yes

C．goodbye

D．much
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问答题

小学三年级语文老师李华执教的两个班，90%的学生是外来务工人员子女。在日常教学中，李老师发现，这些孩子大多握笔姿势不正确、不善与人交流、知识面窄。为了进一步了解外来务工人员子女在学习上面临的困难及其原因，李老师对部分学生进行了家访，并就相关问题询问了本年级其他科任课教师。结果显示：与本市居民子女相比，外来务工人员子女在学习上存在一定差距，其中英语学习差距最大，语文学习次之，数学学习差别不大。为了探索提高这些外来务工人员子女语文学习成绩的有效策略，李老师打算在这两个班进行以“扩展课外阅读”为自变量的实验研究。但是，学校科研顾问认为采取行动研究方式更为适当。李老师陷入困惑，不能确定采用何种方式展开研究。

案例中李老师在发现和确定研究问题的过程中使用了哪些研究方法
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