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