生理盲点
参考答案：
生理盲点：视网膜的视盘(靠鼻侧)无感光细胞，不能感觉光的刺激，故有颞侧局限性视野缺陷。
下列部件一定安装在X线管头内的是（）
A.mA表
B.接触器
C.限时电阻
D.定子线圈
E.高压交换闸
My grandfather is such a forgetful person that he has to _______ many things, even his daily meals. [ ]
A. be remembered by
B. be reminded of
C. be memorized
D. be reminded
