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单频/宽频阻波器谐振于工作频率,对工作频率信号表现为高阻抗,对工频频率表现为低阻抗(<0.04),可提高通道使用效率。( )

A. 对
B. 错

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1.He grew up in 1).2.His dream was to become 2).3.Many of his music idols died before they were 27, which inspired him to do something about 3)before it's too late.4.He bought himself a second-hand 4), joined bands, and played concerts. He also started to 5). He played all the time.5.At 28 he realized that apart frommusic he had his family and friends. He still played but only for fun.

[sə'faɪs] vt. 使满足；足够…用；合格；

[ɪk'strævəg(ə)nt; ek-] adj. 奢侈的；浪费的；

[ə'dɪktɪv] adj. 使人上瘾的