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MusicOpera at Music Hall: 1243 Elm Street. The season runs June through August, with additional performances in March and September. The Opera honors enjoy the Arts membership discounts. Phone: 723-1182.Chamber Orchestra: The Orchestra plays at Memorial Hall at 106 Elm Street, which offers several concerts from March through June. Call 241-2742 for more information.Symphony Orchestra: At Music Hall and Riverbend. For ticket sales, call 381-3300. Regular season runs September through May at Music Hall and in summer at Riverbend.College Conservatory of Music (CCM): Performances are on the main c如图所示电路，电阻R1=R2，当开关都断开时，电流表、电压表的示数分别为I1、U1；当开关都闭合时，电流表、电压表的示数分别为I2、U2，则（ ）A．I1＜I2，U1＜U2B．I1＜I2，U1=U2C．I1＞I2，U1＞U2D．I1＞I2，U1＜U2