A:am going
B:is going
C:are going
D:was going
一个灯泡标有“220V,40W”字样,当把它接到110V的电路上时,它的实际电功率是()
There is a common saying in China________nothing in the world is difficult for one who sets his mind on it.
随着人口的增长和社会经济的发展,总量越来越少,甚至有可能枯竭的自然资源是( )
已知直线l1:(3+m)x+4y=5﹣3m,l2:2x+(5+m)y=8平行,则实数m的值为( )