题目

The managing director took the ________ for the accident, although it was not really his fault.        A. guilt                        B. response                   C. blame                      D. accusation 答案：C 解析: 略（2010?自贡）下面四组电阻分别并联以后总电阻最小的是（　　）A．R1=10Ω  R2=100ΩB．R1=4Ω  R2=40ΩC．R1=20Ω  R2=30ΩD．R1=12Ω  R2=60Ω