外用内服均能收敛止血的药物是（）
A.白矾
B.雄黄
C.降香
D.蜂房
E.硫黄
参考答案：A
解析：白矾能收敛止血，内服外用皆可，故应选A。
请以"My last holiday"为题，写一篇短文。内容包括：
1. Where did you go?
2. When did you go?
3. How did you get there?
4. How long did you spend there?
5. What did you do or see?
6. What was it like?
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人体血液循环中体循环路线是：左心室→______→各级动脉→全身毛细血管网→各级静脉→______→______．
