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Because electromagnetic waves travel at the speed of light, radio communication between astronauts on the moon and the Earth would be_____by delays of only several seconds, whereas astronauts voyaging to the planets world face communications delays of minutes or even hours.
A.bolstered
B.hampered
C.enervated
D.facilitated
E.ravaged
A.bolstered
B.hampered
C.enervated
D.facilitated
E.ravaged
| 重点单词 | 查看全部解释 | |||
| minutes | ['minits] | |||
| communication | [kə.mju:ni'keiʃn] |
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