—That's ____. You can serve it on the food festival.
A:for selling enough
B:enough delicious
C:a pity enough
D:delicious enough
小明将正在发声的手机悬挂在广口瓶内,用抽气筒将广口瓶中的空气抽出.
不等号填空:若a<b<0,则﹣a5____ ﹣b5;1a____ 1b;2a﹣1____ 2b﹣1.