问题
单项选择题
当感抗等于容抗时，则电压与电流同相，这种现象称为( )。
A．理性
B．容性
C．感性
D．电路谐振
答案
参考答案：D
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当感抗等于容抗时，则电压与电流同相，这种现象称为( )。
A．理性
B．容性
C．感性
D．电路谐振
参考答案：D
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| Bedtime stories are one of the delights of early childhood. But according to Dr.Julie Sprecadbury form Queensland University. parents should not 1 up reading to their children 2 they enter mary school. She says listening to.reading and discussing the stories help chidren's 3 . "My 4 indicates that once children can read themseives. most parents stop reading 5 them." Dr.Spreadbury says. " 6 may be at the end of Year I,which is far too 7 ." Dr.Spreadbury says 8 reading not only gives children a good start at school.but brings parents and their children closer. "This makes it 9 for then to open up and talk to parents about things that are worrying them,or things they are 10 in their everyday life." | ||||
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