正弦交流电路中某元件两端的电压为 u=200sin(314t-30°)V,电流为i=10sin(314t－120°)A,则该元件是（　　）元件。                                   

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68472' and id < 4420903 and id<>'4420903' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68472' and id > 4420903 and id<>'4420903' order by id asc limit 5