——Hi, Jane, would you like to go hiking with me on Sunday?
——_________. I have too much homework.
A:I'd love to
B:Of course not
C:That's OK
D:Sorry, I can't
下列关于物质用途的说法错误的是 ()
我国地形复杂多样,我国地形的种类共有几种( )
360+400=____