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单选题
995. 由于交流电的速度,在天线周围产生的电磁场和电场没有时间在交流电周期时完全崩溃。
A
Because of the speed of the AC, the magnetic fields and electric fields created around the emission do not have time to completely collapse as the AC cycles;
B
Because of the speed of the AC, the electromagnetic fields and electric fields created around the antenna do not have time to completely collapse as the AC cycles;
C
Because of the speed of the DC, the electromagnetic fields and electric fields created around the antenna do not have time to completely collapse as the DC cycles;
答案解析
正确答案：B
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