8. Battery-free wireless sensor networks are made possible by the fact that_
A: their maintenance has been greatly simplified
B: the cost of using them has been drastically reduced
C: there is energy in the environment to be utilized
D: modern data communication consumes little energy
A: their maintenance has been greatly simplified
B: the cost of using them has been drastically reduced
C: there is energy in the environment to be utilized
D: modern data communication consumes little energy
举一反三
- Because air pollution has been greatly reduced, this city is still _______ .
- The 5G networks are digital cellular networks, which is aimed at achieving high data rate, reduced latency, energy saving and reduced cost.
- The 5G networks are digital cellular networks, which is aimed at achieving high data rate, reduced latency, energy saving and reduced cost. A: 正确 B: 错误
- There are two spare rooms in the building, (neither) of (them) (has) been provided (with) modern facilities.() A: neither B: them C: has D: with
- Space exploration has been made _____ with the development of modern science and technology.