因为25x=52y，所以x：y=254（一定），
是对应的比值一定，所以x和y成正比例；
故选：A．
As a businessman he was a success, but as a husband he was _______ failure, so their marriage ended in _________failure.
A．/ ; /
B．/ ; a
C．a; a
D．a; /
下列关于强直性脊柱炎的说法哪项不正确
A．本病好发于男性B．多于骶髂关节首先发病C．表现为骶髂关节炎症及疼痛D．晚期脊柱可呈竹节样改变E．本病可自愈
