正确答案: A

均匀变化的磁场能够在空间产生电场

题目：下列关于电磁波的说法正确的是

解析：A

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学习资料的答案和解析：

[单选题]DWhen students and parents are asked to rate subjects according to their importance, the arts are unavoidably at the bottom of the list. Music is nice, people seem to say, but not important. Too often it is viewed as mere entertainment, but certainly not an education priority(优先). This view is shortsighted. In fact, music education is beneficial and important for all students.

regardmusicasawayofentertainment

[单选题]I agree to his suggestion the condition that he drops all charges.

on

[单选题]

observed

[多选题]假蝶形花冠与蝶形花冠的区别在于( )不同。

花瓣形态

花瓣排列方式

解析：BC

[单选题]子房基部着生在花托上，花的其他部分都低于子房着生，这种花叫做( )。

上位子房下位花