数据库管理系统常见的数据模型有层次模型、网状模型和______三种。
参考答案:关系模型
根据首字母提示或括号内的汉语意思拼写单词。
1. We gained a lot of p_____ from your advice.
2. Your technical _____ (援助) in the project is greatly appreciated.
3. We went to the party with our parents' a_____.
4. I want to _____ (祝贺) you with all my heart.
5. Martin decided that he had no _____ (足够的) proof.
6. Are you alone or with a c_____?
7. Only a few people have a_____ to the full facts of the case.
8. He hopes to get a good job after _____ (毕业).
男性,35岁。血压24/13.3kPa(180/100mmHg),经服硝苯吡啶及血管紧张素转换酶抑制剂治疗3周后,血压降至16/10.6kPa(120/80mmHg),关于停药问题应是
A.立即减少药物剂量
B.可以停服降压药
C.停药后血压增高再服
D.继续服药,在数月期间如血压保持稳定后,再逐渐减少至能维持血压稳定的最小剂量
E.为避免血压下降过低,应停药,待症状出现随时恢复用药