粉末中有分支状石细胞、草酸钙方晶、晶鞘纤维的药材是()
A.肉桂
B.厚朴
C.黄柏
D.牡丹皮
E.甘草
参考答案:C
—Do you know if Linda is willing to take charge of the program?
—________, does it?[ ]
A. It takes no time
B. It counts for nothing
C. It doesn't hurt to ask
D. It doesn't make sense
如图中A、B、C分别表示三种物质的溶解度曲线.
(1)在t3℃时,三种物质的溶解度由大到小的顺序是______.
(2)在______℃时,B和C溶解度相同.
(3)t3℃时,A、B、C的饱和溶液各Wg,冷却至t1℃时,析出晶体最多的是______,没有晶体析出的是______.
(4)要在A、B、C混合物中分离C可用______的方法.