液体制剂常用的附加剂包括（）。
A、防腐剂
B、矫味剂
C、助溶剂
D、着色剂
E、增溶剂
参考答案：A, B, C, D, E
A．《论衡》
B．《史记》
C．“麻沸散”
D．地动仪
E．焚书坑儒
F．“光武中兴”
By referring to Sam' s broken bicycle, the author intends to ______.
A．illustrate the ways to repair his bicycle
B．discuss the problems of his bicycle
C．tell us how to solve a problem
D．show us how to analyze a problem
