过用劳力，目力，思虑过度以及房事不节等常可致
A．眼内出血
B．视正为斜
C．视大为小
D．暴盲
E．高风雀目
参考答案：A,B,C,D
下列不属于桑代克尝试错误学习理论三大主律的是()
A．效果律
B．练习律
C．准备律
D．强化律
Most museums are just for looking. But today some of them have things for you to touch.The ＿＿say,“＿＿”
A．signs; Do touch
B．notices; To touch
C．signals; Be touching
D．signs; No touching
