味苦，具有清热解毒、凉血消肿功效，煎剂易致恶心呕吐，用量不宜过大的是（）
A.苦参
B.穿心莲
C.谷精草
D.密蒙花
E.熊胆
参考答案：B
用所给单词的适当形式填空
1. Trees must __________(prevent) from being cut down.
2. They __________(plant) ten thousand trees by last spring.
3. The sheep __________(tie) to the tree has eaten a lot of grass.
4. I can easily hear combs __________(go) through hair.
5. Great changes __________(take) in our hometown in the last ten years.
颈内动脉系统短暂性脑缺血发作的症状可有（）
A.阵发性眩晕
B.复视
C.交叉性瘫痪
D.吞咽困难
E.运动性失语
