Oldpeople,whoriskvitaminDdeficiency,shouldspendevenlongerexposedto（10）daylight.
举一反三
- 46.___ A: To standardize daylight saving time. B: To establish year-round daylight saving time. C: To abolish daylight saving time. D: To shorten daylight saving time.
- 中国大学MOOC: Old people, who risk vitamin D deficiency, should spend even longer exposed to （10） daylight.
- Questions 11-13 are based on the following talk about the history of daylight saving time. According to the speaker, what was the effect of the Uniform Act of 1966 A: To standardize daylight saving time. B: To establish year-round daylight saving time. C: To abolish daylight saving time. D: To shorten daylight saving time.
- 7. ____winterthere are only six hours of daylight.
- Why did one scientist expose birds to artificial daylight（） A: To test the relationship between daylight and a disease of the glands common to birds. B: To test the relationship between daylight and migration. C: To test the relationship between migration and temperature. D: To test the relationship between daylight and changes in the season.