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【简答题】
训练鸽子绿灯亮时啄键、红灯亮时停止。对作出正确反应的鸽子给予玉米的奖励。请问因变量、因变量、控制变量分别是( )
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皮皮学刷刷变学霸
举一反三
【单选题】What does meir daughter do?
A.
She is a doctor．
B.
She is a teacher．
C.
She is a student．
【判断题】单轴重复定位精度精密级为<0.003mm。< /div>
A.
正确
B.
错误
【单选题】—What is the matter with Mary? —______. [ ]
A.
She is a student.
B.
She is reading.
C.
She has a bad cold.
【单选题】—What does she look like? —_____ [ ]
A.
She's a student.
B.
She's twelve.
C.
She is tall.
【单选题】She is a very ______ student. She's always talking about traveling to outer space.
A.
imaginary
B.
imaginative
C.
imaginable
D.
imagining
相关题目：
【判断题】单轴重复定位精度精密级为<0.003mm。< /div>
A.
正确
B.
错误