. He was so foolish _______ his car unlocked. A. to leave B. that leave C. as to leave D. for him to leave 答案:C8.某控制电路如图所示,主要由电源(电动势为E、内阻为r)与定值电阻R1、R2及电位器(滑动变阻器)R连接而成,L1、L2是红、绿两个指示灯,当电位器的触片滑向a端时,则下列关于红、绿两灯亮度变化的情况说法正确的是( )A.L1、L2两个指示灯都变亮B.L1、L2两个指示灯都变暗C.L1变亮,L2变暗D.L1变暗,L2变亮