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【单选题】A Long, long ago people made fires from lightening (闪电 ). But they had to keep the fire burning, for they couldn't start it again if there was no lightening. Later, they found out hitting two pieces o...
A.
a hole in a big piece of wood
B.
putting a smaller stick into the hole
C.
turning the stick hard for a while
D.
doing all the above in order
【单选题】打雷时，先看到闪电后听到雷声的原因是[ ]
A.
闪电先发生，打雷后发生
B.
打雷先发生，闪电后发生
C.
闪电和雷声同时发生，但光速比声速大得多
D.
发生闪电的地方离地面近
【单选题】雷鸣闪电时,可以从开着的收音机里听到“咯咯”的响声,这是因为()
A.
收音机出现故障
B.
空气潮湿的缘故
C.
雷声传到了收音机中
D.
收音机收到了云层间传来的电磁波
相关题目：
【单选题】A Long, long ago people made fires from lightening (闪电 ). But they had to keep the fire burning, for they couldn't start it again if there was no lightening. Later, they found out hitting two pieces o...
A.
a hole in a big piece of wood
B.
putting a smaller stick into the hole
C.
turning the stick hard for a while
D.
doing all the above in order
【单选题】打雷时，先看到闪电后听到雷声的原因是[ ]
A.
闪电先发生，打雷后发生
B.
打雷先发生，闪电后发生
C.
闪电和雷声同时发生，但光速比声速大得多
D.
发生闪电的地方离地面近
【单选题】雷鸣闪电时,可以从开着的收音机里听到“咯咯”的响声,这是因为()
A.
收音机出现故障
B.
空气潮湿的缘故
C.
雷声传到了收音机中
D.
收音机收到了云层间传来的电磁波
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