【简答题】What was the writer afraid of when he first became a college student?
【简答题】甲乙两土样的颗粒分析结果列于下表,试绘制级配曲线,并确定不均匀系数以及评价级配均匀情况。
【简答题】What was the writer interested in seeing on the Climatr Change Walking Tour? Give four details.
【单选题】下列与浸渍的特点不符的是
A.
药材可用较多浸出溶剂浸泡,适宜于黏性药材、无组织结构的药材。
C.
方法比较简单易行,尤其适用于有效成分遇热易挥发或易破坏的药材
D.
浸出效率高,可对贵重及有效成分含量低的药材浸取
E.
制备浓度较高的制剂时,应采用重浸渍法或渗漉法
【简答题】甲乙两土样的颗粒分析结果列于下表,试绘制级配曲线,并确定不均匀系数以及评价级配均匀情况。(计算题)