What is the main cause of the significant change in the earth’s atmosphere?
举一反三
- what the analogy is: which two things are being compared?The earth’s atmosphere is like a blanket of gases around the earth. It is only a thin layer but it helps to maintain the temperature of the earth, keeping us warm. It also offers a layer of protection from the intensity of the sun. A: earth’s atmosphere and a blanket B: earth’s atmosphere and gases C: earth’s atmosphere and a layer of protection D: earth’s atmosphere and a blanket of gases
- to cause a change or have a significant effect on a person or situation
- The main difference between the Earth's atmosphere and the simulated one is ______. A: their size. B: their content. C: their height. D: their density.
- 2. Carl Sagan believes that Venus might be colonized from earth because ____. A: it might be possible to change its atmosphere B: its atmosphere is the same as the earth’s C: there is a good supply of water on Venus D: the days on Venus are long enough
- What, according to Ned, the first speaker, is the main cause of the country’s problem?