两个不同阻值的电阻并联，其总电阻值比小电阻的大，比大电阻的小。
参考答案：错
Private cars are becoming very popular though most of them still ______too much
A．pay
B．cost
C．sell
D．spend
具有温中止呕功效的药物是
A．荆芥B．香薷C．防风D．细辛E．生姜
