在数据库设计器中,永久关系表现为表索引之间的 【15】 。
参考答案:连线
根据下列句子及所给单词的首字母,写出各单词的完全形式(每空限填一词)。
1. Be careful. There is a wine b_______ on the table. You might break it.
2. The number after twenty-nine is t________.
3. Have you e________ been to the Great Wall?
4. It's dangerous to d________ a car after you get drunk.
5. Your parents are your f________ and mother.
6. If a dream comes t________, it actually happens.
7. W________ is the coldest season of the year.
8. When snow f________, it comes down from the sky.
9. It's best to water plants either e________ in the morning or late at night.
10. We don't go to the c________ much for movies because we have a video.
对病人不一定有助益,可能违背医学伦理学有利原则的做法是()
A.根据病情作相应检查
B.根据病情作相应治疗
C.根据病情给予止痛手段
D.病人受益而不给他人太大伤害
E.病人患癌症而且到了晚期时告知他本人