工业生产硝酸的过程常会产生一些氮的氧化物,可通过下列反应处理:NO+X+2NaOH=2NaNO2+H2O,其中X的化学式为( )
A:O2
B:NO2
C:N2O3
D:N2O5
下列物质的性质中,既包含物理性质,又包含化学性质的是( )
下列几种氢键:①O﹣H…O、②N﹣H…N、③F﹣H…F、④O﹣H…N,按氢键从强到弱的顺序正确的是( )
She looked at his fingers with wonder as they turned each page and suddenly reached for his hand. She was amazed by his and the softness and warmth of his skin.
根据句意及首字母填空。