Carbon dioxide is now a threat to ______.
A: people staying indoors
B: people in poor health
C: the earth's vegetation
D: the earth's temperature
A: people staying indoors
B: people in poor health
C: the earth's vegetation
D: the earth's temperature
举一反三
- Why is more earth's heat blocked from escaping with more carbon dioxide in the atmosphere A: Carbon dioxide prevents the sun's energy from going back into space. B: Carbon dioxide radiates the sun's energy onto the earth. C: Carbon dioxide produces more heat in the atmosphere. D: Carbon dioxide takes in the sun's energy at infra-red wavelengths.
- What will the newly-launched observation satellite do? A: It will record carbon dioxide emissions and absorption worldwide. B: It will identify carbon dioxide emission sources with higher efficiency. C: It will monitor carbon dioxide levels in Earth’s atmosphere. D: All of the above.
- The purpose of Earth Day is ______. A: to help people memorize the earth B: to help people to learn how to protect the earth C: to unite all the people on the earth D: all of the above
- Magellan’s voyage ______ some people’s belief that the earth was round. A: shortened B: attacked C: removed D: proved
- 17e44787ba63461.png1. If the earth's temperature rises, it will be a disaster for all_______________.