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【单选题】
以下关于理想介质中的正弦均匀平面电磁波说法错误的是A.
电场与磁场分量相位相同
B.
电场与磁场分量有效值之比为常实数
C.
其等相位面和等振幅面一致
D.
电磁波在传播过程中逐渐衰减，振幅逐渐变弱
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举一反三
【简答题】Many people love watching magic shows, but they don’t really ________ magic.
【简答题】试述肺炎支原体和解脲脲原体的致病性。
【单选题】2 People love magic because __________.
A.
a. the show doesn’t cost much
B.
b. magicians can make the impossible happen
C.
c. it is a centuries-old art
【单选题】People love magic because___________
A.
the show doesn't cost much.
B.
magicians can make the impossible happen
C.
it is a centuries-old-art
【单选题】Among the people charmed by the medicine "Love-in-Idleness," who is not removed form the magic spells?
A.
Demetrius
B.
Lysander
C.
Hermia
D.
Tatania
【单选题】When the author mentions the Indian fakir, he shows that______.
A.
fakirs possess magic power
B.
Indians are not afraid of pain
C.
people can learn to cope with pain
D.
some people are born without a sense of pain
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