【单选题】下列关于化学键合相色谱法说法正确的是
A.
化学键合相色谱法分为正相键合色谱法和反相键合色谱法
B.
化学键合相色谱法适用于所有类型化合物的分离分析
【单选题】There are too many difficulties for us _______ . We really don’t know _______ to do.
【简答题】Too many senators use debates as a chance to ______ political points.
【单选题】Every day, we have ______ food, so many of us lose health. [ ]