抛物线y2=4x的焦点到准线的距离是______.
根据题意可知焦点F(1,0),准线方程x=-1,
∴焦点到准线的距离是1+1=2
故答案为2.
I’m sorry I can’t lend any money to you because I have ______ my purse at home.
A.left
B.forgotten
C.lost
D.put
※ [11~13]
(4 )
A.
B.
C.
D.