When a spacecraft travels, one of the major problems is re-entry into the Earth's _______.
A: surface
B: atmosphere
C: attitude
D: bent
A: surface
B: atmosphere
C: attitude
D: bent
举一反三
- When a spacecraft travels, one of the major problems is reentry into the Earth’s _______.
- _____ is covered with heavy snow. A: The earth’s surface B: The surface of earth C: The surface earth D: The earth surface
- ______ is covered with heavy snow. A: The surface of earth B: The earth’s surface C: The earths’ surface D: The surface
- 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
- Photosynthesis is a major source of which of the following gases in Earth's atmosphere? A: CO2 B: H2O C: O2 D: H2 E: N2