What does the example of three cars explain for? ().
A: Unmanned vehicles are much better than manual in term of safe
distance.
B: Unmanned
vehicles are much better than manual in term of reaction time.
C: Unmanned vehicles can greatly reduce greenhouse gas emissions.
D: Unmanned vehicles can greatly increase greenhouse gas emissions.
A: Unmanned vehicles are much better than manual in term of safe
distance.
B: Unmanned
vehicles are much better than manual in term of reaction time.
C: Unmanned vehicles can greatly reduce greenhouse gas emissions.
D: Unmanned vehicles can greatly increase greenhouse gas emissions.
举一反三
- The<br/>total reaction time of unmanned vehicles is about(). A: 0.6s B: 1.2s C: 0.3s D: 0.2s
- Using some ________ fuels ,such as natural gas, in vehicles can generally00a000a0reduce harmful pollutants and exhaust emissions.
- Unmanned aerial vehicles (UAV) are too expensive for anything but military budgets.
- ______ are the manned or unmanned vehicles which are designed to<br/>explore the space. A: Housing B: Dialects C: Spacecraft D: Bulls
- Natural gas vehicles have lower emissions compared with conventional cars running on diesel or gasoline．