There are not many cars on the road____ ____the bad weather.
在同学家做客,你想吃桔子时,可以说:( )
在“测定小灯泡额定功率”的实验中(小灯泡标有“3.8V“字样,灯泡的电阻约为12Ω):
若一元二次方程x2+2x+m=0有实数解,则m的取值范围是( )