有小毒，婴幼儿慎用的是（）
A.旋覆花
B.款冬花
C.紫菀
D.杏仁
E.白芥子
参考答案：D
What are students’ responses about the result of the survey().
A. They doubt this study.
B. They are not surprised.
C. They blame the result on university.
D. Both b&c.
我国配制液压支架乳化液用水的硬度等级是怎样划分的，标准是什么？
