决策中的各种智囊组织经常被称为决策者的（）。
A.秘书
B.助手
C.领导者
D.外脑
参考答案：D
The occasion was_________ at many schools by a three-day holiday. [ ]
A. congratulated
B. celebrated
C. congratulated on
D. celebrated on
电阻消耗的功率在任一瞬时都是正值，即在任一时刻都向电源吸收电能。。
