题目

 Freely rented public bicycles, which the crowd show great enthusiasm for, are _____________ in Taiyuan, the capital city of Shanxi Province. A. approachable     B. admirable            C. accessible               D. available 答案：D如图所示的电路里，在圆圈a，b，c上连接适当电表，使灯L1和L2并联且能发光，那么a应是________；b是________；c是________．