A:100ml 2mol/LFeCl3溶液
B:75ml 1mol/LMgCl2溶液
C:150ml 3mol/LKCl溶液
D:25ml 2mol/LAlCl3溶液
自然界中,有的物体属于生物,有的物体属于非生物.下列属于生物的是( )
设双曲线的焦点在x轴上,两条渐近线为y=±12x,则该双曲线的离心率e为( )
- Today's young people can't live without smart phones.
- They keep their hands on the phones whether they go, even while they ______ meals.