A.灯L1开路
B.灯L2开路
C.灯L1短路
D.灯L2短路
答案:D
已知直线y=k(x+2)(k>0)与抛物线C:y2=8x相交于A、B两点,F为C的焦点,若|FA|=2|FB|,则k=()
A.选项A
B.选项B
C.选项C
D.选项D
--What can you see on the table? –We can see four ___ and six ______.
A.bottle of milk, tomato
B.bottle of milks, tomatos
C.bottles of milk, tomatoes
D.bottles of milks, tomatoes