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  • 2022-06-05
    Before the drug is used on human beings, experts have to ______ dogs.
    A: be experimented
    B: experiment
    C: experiment with
    D: experiment on
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    举一反三

    • In designing an experiment, blocking is used A: to reduce variation B: to control the level of the experiment C: as a first step in randomization D: None of the above
    • (13 Down) What must this experiment have the potential to do, to be a ______ (有效的) scientific experiment?
    • 1. According to Dr. Ariely’s book, Predictably Irrational, what might be a weakness of human beings? (Para.4) ‎ A: His experiment shows that people just couldn’t bear to see their options vanish. B: His experiment shows that people always want to keep all the doors open. C: His experiment shows that people are fond of playing games. D: His experiment shows that people do not bother to bring with them the key to the door.
    • A) Tony could not continue the experiment B) Tony finished the experiment last night. C) Tony thought the experiment was well done. D) Tony had expected the experiment to be easier.
    • 中国大学MOOC: In designing an experiment, blocking is used

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