斜视手术术后的并发症有
A．矫正不足与过度矫
B．复视
C．眼内炎
D．眼前段缺血
参考答案：A, B, C, D
经过一点______一条直线垂直于已知直线．
Here are two pencils. ______is red, ______is black.[ ]
A. One, one
B. One, other
C. One, the other
D. One, the one else
