A:to think of; whe
B:to think of; which
C:thinking of; which
D:thinking of; whe
下列各组中的性质比较,正确的是( )
①酸性:HClO4>HBrO4>HIO4
②碱性:Ba(OH)2>Ca(OH)2>Mg(OH)2
③还原性:F﹣>Cl﹣>Br﹣
④稳定性:HCl>H2S>PH3.
(2015•菏泽)已知A(﹣1,m)与B(2,m﹣3)是反比例函数y=kx图象上的两个点.则m的值____
—I am going to_______ some money to the Red Cross Society.