哪种斜视一般不会引起弱视（）
A.单眼恒定性斜视
B.麻痹性斜视
C.恒定性垂直斜视
D.交替性斜视
E.以上都可引起
参考答案：D
I knocked at the door hard,and soon the door opened and a _____ face looked out, “ who is troubling me at this time of night.”
A．surprised
B．surprising
C．sruprise
D．surprisingly
χ2检验的用途有()
A.两个或多个样本率或构成比的比较
B.两个或多个样本均数的比较
C.频数分布的拟合优度检验
D.两属性变量间的关联分析
E.以上都对
