已知⊙O的半径为13,AB、CD是⊙O的弦,AB∥CD且AB=10,CD=24,则AB、CD之间的距离为( )A、7 B、12 C、17 D、7或17
Fresh water ________ more important than anything else.( )
is
are
was
were
﹣Are your grandparents both Americans?
﹣No._____ my grandfather is an American and my grandmother is a Chinese.
Recently
Finally
Actually
Is this the museum you visited last year?
where
that
in which
﹣ This is a photo of our family.Would you like to see it?
﹣ Wow! happy family!
What a
How a
What
There is no light on,they _______ be at home.
mustn't
can't
needn't