多用于口含片和咀嚼片的稀释剂是（）
A.红糖
B.冰糖
C.蔗糖
D.饴糖
E.蜂蜜
参考答案：C
I took mathematics and physics because I think that _______very important for me to make further
research in this field. [ ]
A. that is
B. they are
C. this
D. which are
定时限过电流保护范围为本线路的全长。（）
