成人每日消化道出血大于（）ml可有粪便隐血试验阳性，（）ml可有黑粪。
参考答案：5～10；50～100
写出下列词语的缩略形式。
1. is not → _____________
2. he is → _____________
3. who is → _____________
4. can not → _____________
5. are not → _____________
6. let us → _____________
7. what is → _____________
8. where is → _____________
备急散功效与作用
