関連ワード:  what is the use of a control variable    what is the purpose of a control variable in an experiment    what is the purpose of a control variable    what is the function of a control variable    what is the purpose of a control variable and constants in an experiment    what is the purpose of a control variable in science    what is the purpose of a control variable in research    what is the use of control variable in research    what is the purpose of a independent variable    what is the purpose of a loop's control variable  
結果 : what is the use of a control variable