A:①>②>③>④>⑤
B:⑤>④>③>②>①
C:③>①>④>②>⑤
D:③>④>⑤>①>②
分式a-2a+2的值为零,则a的值为____ .
— What can I do for you, sir?
— I'd like two ________.
与秦岭一淮河一线相吻合的界线是 ( )