A:氢化物热稳定性:H2S>HCl
B:酸性:H2SO4>H3PO4
C:碱性:NaOH>Mg(OH)2
D:离子半径:O2﹣>Na+
—Look at ____skirt. I bought it for mother on Mother's Day, isn't it nice?
—Oh,what ____nice present!