Some lights used as aids to marine navigation have a red sector to indicate a danger area. The limits of a colored sector of a light are listed in the Light List in which of the following manners?（）

There is another thing I want to let you know.The lighting in the hold is very poor，even （）dark to work the cargo.

According to those who welcomed the railway, the railway itself should include all the following except that ______.

According to the passage，the greatest challenge to the new high-speed railway plan is ．

I travel to the Binhai New Area by light railway every day, _____ do many businessmen who live in downtown Tianjin.

Vessels are warned（）in the area enclosed by pecked lines owing to the existence of numerous telegraph cables.

Modern handheld digital tachometers operated by counting light pulses returned to the unit by

By the time you get to New York, I（）(已经动身去) London.

There is a vessel carrying（）hydrographic survey in the area marked by red lights.

I remember _____ to the zoo by my father when I was little.

Sometimes lights are（）by fog，haze，dust，smoke，or precipitation which may be present at the light，or between the light and the observer，and which is possibly unknown by the observer.