单项选择题

According to the last paragraph, which of the following statements is NOT true

A．Other cities hope they can also conserve power.
B．Other cities hope they can use superconducting cables soon.
C．Superconductors waste less power because of their low resistance.
D．The Frisbie experiment is not successful.

<上一题目录下一题>

热门试题

单项选择题

Compared to common electrical conductors, superconductors

A．have little or no electrical resistance.
B．can be used for a long time.
C．are not energy-efficient.
D．can be made easily.

单项选择题

What is the benefit of the revolution mentioned in the first paragraph

A．With a flip of switch, electricity can be transmitted.
B．Other American cities can benefit from the high-performance cables.
C．Great amounts of power can be conserved.
D．Detroit will first receive electricity transmitted by the new electrical cables.