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问题 多项选择题

下列关于激活集和候选集搜索窗说法正确的是（）。

A.激活集和侯选集导频搜索使用完全相同的搜索窗

B.窗口搜索速度要求较快

C.每个激活集和侯选集导频有一个搜索窗口

D.每个窗口的中心设置在自己最早到达可用多径位置处

E.激活集和候选集搜索窗大小不同

答案

参考答案：A, B, C, D

改错题

Dear Tom,

I was surprising to receive your letter a few days ago. Since I came to the new school, I had planned to write to you. Therefore, the busy life of the school spared me no time. After came to the school, I made up of my mind to study hard. To tell you the truth, that was Miss White, my new English teacher, who changed my mind. She suggested that I give in my bad habits. Although he is very strict with us, all the students fond of her.

I have to stop here. I am looking forward to hear from you soon.

Yours,

Li Hua
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单项选择题

双焦眼镜的主片处方为：R：-1.00-0.75×180，L：-2.00-1.75×180子片焦度为+2.00D，近视线点位于远视线点下方8mm，则双眼顶心距差异为（）双眼无视觉干扰。

A、2mm

B、3mm

C、4mm

D、5mm
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