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【单选题】
下列说法中，不正确的是A.
根据分散质粒子的大小，可将分散系分为溶液、胶体和浊液
B.
胶体中分散质粒子的大小通常大于100nm
C.
可以利用丁达尔效应区分胶体和溶液
D.
向沸水中逐滴加入适量 饱和溶液，煮沸至液体呈红褐色，可制得 胶体
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举一反三
【单选题】____no need for us to discuss the problem again since it has already been solved.
A.
It has
B.
There has
C.
We have
D.
There is
【单选题】_______for us to discuss the problem again.It has already been settled. [ ]
A.
It has no doubt
B.
There has no doubt
C.
It is no need
D.
There is noneed
【简答题】三叉神经痛者首选的是（）|推荐反复性偏头痛者服用的是（）|推荐长期精神紧张、紧张性头痛者应用的是（）A. 布洛芬B. 谷维素C. 地西泮D. 卡马西平E. 麦角胺咖啡因片
【单选题】___ no need for us to discuss the problem again. It has already been settled.
A.
It has
B.
There has
C.
It is
D.
There is
【单选题】()no need for everyone to do the problem again because it has already been solved.
A.
.It is
B.
.It has
C.
.There is
D.
.We have
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