题目

The managers are having a meeting later, at which the decision _______ will influence the future of our company.   A. to be made          B. being made             C. made                      D. having been made 答案：A 如图所示，若要使L1和L2两灯组成并联电路，则应闭合开关________，断开开关________；若要两灯组成串联电路，则应闭合开关________，断开开关________．