在实验尚未正式开始前先行着手控制额外变量的方法称为实验前控制_爱下问搜题

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问题填空题

在实验尚未正式开始前先行着手控制额外变量的方法称为实验前控制。但有时候由于条件限制，在实验前，难以完全控制额外变量的影响，这时必须使用实验后控制，又称为（）。

答案

参考答案：统计控制

完形填空

I will never forget what happened to me that day. That afternoon，I was sitting at my favorite table in a restaurant, waiting for the food I had ordered to arrive. Suddenly I 16 that a man sitting at a table near the window kept glancing in my direction, 17 he knew me. The man had a newspaper 18 in front of him, which he was 19 to read, but I could 20 that he was keeping an eye on me. When the waiter brought my 21 the man was clearly puzzled (困惑) by the 22 way in which the waiter and I 23 each other. He seemed even more puzzled as 24 went on and it became 25 that all the waiters in the restaurant knew me. Finally he got up and went into the 26 . When he came out, he paid his bill and 27 without another glance in my direction.
　　 I called the owner of the restaurant and asked what the man had 28 . “Well,” he said, “that man was a detective (侦探). He 29 you here because he thought you were the man he 30 . ” “What?” I said, showing my 31 . The owner continued, “He came into the kitchen and showed me a photo of the wanted man. I 32 say he looked very much like you! Of course, since we know you, we told him that he had made a 33 ”. “Well, it’s really 34 I came to a restaurant where I’m known,” I said. “ 35 , I might have been in trouble. ”

A．chatted with

D．talked about

D．calmed down

A．was to beat

B．was dealing with

C．was to meet

D．was looking for

单项选择题

甲状腺癌的常见病理类型，不包括

A． * * 状腺癌
B．滤泡状腺癌
C．未分化癌
D．鳞癌
E．髓样癌