A:To be worked
B:To work
C:Having worked
D:Having been worked
—I am really struck by your spoken English. You speak so fluently. Have you been abroad?
—Yes. I ______ in London for two years.
下面的计算对吗?
4.48÷3.2=1.4
在方程(k2-4)x2+(2-3k)x+(k+1)y+3k=0中,若此方程为二元一次方程,则k值为( )
选择适当的关联词。
雷锋_____死了,_____他的精神永远在我们心中。( )