多项选择题

下列关于道路照明开关灯时天然光照度的说法，哪些项要求是正确的？（ ）

A.主干路照明开灯时宜为15lx
B.主干路照明开灯时宜为30lx
C.次干路照明开灯时宜为15lx
D.次干路照明关灯时宜为20lx
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多项选择题
在气体放电灯的频闪效应对视觉作业有影响的场所，应采用下列哪些措施？（ ）
A.灯具设置电容补偿
B.采用高频电子镇流器
C.相邻灯具分接在不同相序
D.单相供电，使场所的灯具接在相同相序上
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听力原文：M: Mary, would you go to the Children's Center with us this Sunday afternoon?W: Well, I'd like to, but Mum asked me to see her nephew Tom at No. 1 People's Hospital.M: It doesn't matter. What's wrong with Tom? Does he have a bad cold or have a headache?W: I was told that he hurt himself in the left left during the football gamE.M: I'm sorry to hear that. How long has he been in the hospital?W: Three days. He was sent to the hospital as soon as his leg was hurt.Where is the boy going?A.The Children's PalacE.B.The Children's Center.C.The hospital.
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