下列不属于证券市场层次结构关系的选项是（）。
A.发行市场和交易市场
B.一级市场和二级市场
C.有形市场和无形市场
D.初级市场和次级市场
参考答案：C
ERCP术后容易并发胰腺炎高危的患者包括（）。
A.年龄＞40岁
B.十二指肠憩室
C.SOD
D.既往ERCP术后出现胰腺炎
E.术前未用生长抑素
用括号内所给单词的适当形式填空。
1. We _____ (plant) some flowers in the garden last week.
2. A: I _____ (lose) my purse!
B. Bad luck! When _____ you _____ (lose) it?
A: I _____ (lose) it last night.
3. He _____ (come) back home, he _____ (watch) TV now.
4. David _____ (finish) his homework just now.
5. The monkeys are full, because we _____ (feed) them.
