当前位置：首页 >
综合英语（一）(00794) > 正文内容
It's hard to notice whether a painting has been turned upside down ( ) it is an abstract modern painting.
It's hard to notice whether a painting has been turned upside down ( ) it is an abstract modern painting.
A.when
B.though
C.unless
D.for
正确答案是A
扫描二维码免费使用微信小程序搜题/刷题/查看解析。
版权声明：本文由翰林刷题小程序授权发布，如需转载请注明出处。
，则对应的二次型f(x1,x2,x3)=_________.