主动脉瓣狭窄病人超声心动图显示( )
A.左心室增大B.左心房增大C.右心房增大D.右心室增大E.左心房、左心室增大
参考答案:A
一个非零的自然数若能表示为两个非零自然数的平方差,则称这个自然数为“智慧数”,比如28=82-62,故28是一个“智慧数”.下列各数中,不是“智慧数”的是( )
A.987
B.988
C.30
D.32
Could it be in the restaurant ______ you had dinner with me yesterday _______ you lost your handbag?
A.that; which
B.which; that
C.where; that
D.that; where