单项选择题

Ice particles bouncing off hail falling through a cloud acquire______.

A．a negative charge
B．no electric charge at all
C．a positive charge
D．bothA) and
<上一题 目录 下一题>
热门 试题

单项选择题
According to Dr. Scorer, lightning is caused by______.
A．rain falling through clouds
B．hail falling through supercooled clouds
C．hail falling through superheated clouds
D．ice particles falling through any clouds
单项选择题
According to the passage, Benjamin Franklin was the first to prove that______.
A．lightning is caused by hail through supercooled clouds
B．thunderclouds are not charged with electricity
C．thunderclouds are charged with electricity
D．lightning was not an invention of the devil
相关试题