— Can I have ______cakes, please?
— Sorry, I don't have _____ cakes in my fridge.
A:some; any
B:any; any
C:any; some
D:some; some
为使毛巾尽快晾干应尽量展开,是因为液体____ 越大,蒸发越快。
① BD→⋅AC→≠0 ;
②∠BAC=60°;
③三棱锥D﹣ABC是正三棱锥;
④平面ADC的法向量和平面ABC的法向量互相垂直.
其中正确的是( )
把 -14-34+45+123-314 还原成加法的和的形式是( )