题目

使一LC振荡回路中电容器的带电荷量最大值增大一倍，其他条件保持不变，则回路的（    ） A.固有振荡周期增大一倍                B.振荡电压最大值提高一倍C.固有振荡周期不变                      D.固有频率减小为一半 答案：BCThe camera is _______expensive________ I can't afford it. A．so, thatB．such, that C．so, as toD．enough, that