正确答案: C

(－x)2+2

题目：下列代数式中，值一定是正数的是( )

解析：C

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举一反三的答案和解析：

[单选题]________________

ideas

[单选题]2． The mother is ________weak _________look after her little daughter．

too ,to

[单选题]CThey wear the latest fashions with the most up-to-date accessorise(配饰)。Yet these are ginrls in their teens or twenties but women in their sixties and seventies.A gengration which would once only wear old-fashioned clothes is now faouring the same high street looks worn by those half their age.

the price of clothes has generally fallen by 70%

[单选题]14．

are '

[单选题]22． Last year they became good friends again __________ after they didn’t talk with eachother for a long time．

on Mid-Autumn Day

解析：22.A【解析】从第一段第三、四句可知他们在中秋节那天再次成为好朋友。