【多选题】信用社年度决算前的准备工作主要包括()。
【单选题】在某一化学反应中,反应物B的浓度在5 s内从2.0 mol/L变成0.5 mol/L,在这5 s内B的化学反应速率为
【单选题】在某一化学反应中,反应物B的浓度在5 s内从2.5 mol/L变成0.5 mol/L,在这5 s内B的化学反应速率为( )
【单选题】It is often more difficult to find trained men than ___for scientific research.
A.
getting financial support
B.
to get financial support
D.
in getting financial support
【单选题】______is often more difficult to find trained men than to get financial support for scientific research.
【单选题】My brother while he his bike and hurt himself.
【单选题】下列各物质的分子间只存在色散力的是( )