A：I've got an e-book from Lingling.
B：I've got an email from Lingling.
C：She's got an e-book from Lingling.
回答下列问题：
二次函数y=x2+4x﹣3的最小值是____．
— The match is so exciting. The opposite team is really strong.
— You’re right. But I am sure our team will win!
外电对中国的改革有这样的评论：起初中国的经济改革是摸着石头过河，20世纪90年代初才确立了经济改革的目标。这里的“目标”是指（ ）
