题目

___ is no possibility____ Bob can win the first prize in the match A. There…that      B. It…that          C. There…whether         D. It…whether 答案：A19．下列排列顺序正确的是（　　）A．热稳定性：H2O＞HF＞H2SB．最高正化合价：F＞N＞CC．氧化性：Na+＞A13+＞Fe3+D．非金属性：Cl＞S＞Si