皮皮学，免费搜题
登录
搜题
【单选题】
采用Primary key定义主键时,如果一个表中有两个字段一起共同作主键,那么主键约束应该( )A.
分别定义在做主键的列上
B.
设置为列级约束
C.
设置为表级约束
D.
以上都不正确
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】He often went from town to town giving lectures.
【简答题】结合书上P14,P16文本内容将下文Kitty写的日记内容补充完整,使其上下句句义通顺。 Last Friday evenging, Ben and I ___1___(be) at home. I wanted to read a book. but I ___2__ a drill outside. It __3__(be) noisy. After that, Ben wanted to d...
【简答题】用方框中适当的词填空。 even if , until , so that , even though , although 1. Say it loudly_______ we can hear you clearly. 2. He didn't go to bed_______ he finished the work. 3. He went on with the work_______ h...
【简答题】用所给词的适当形式填空。 1. Would you mind (not talk) so loudly in class? 2. Mr. Wang likes Betty, because she is active and talks (polite) while she is with her friends. 3. Jenny said she (buy) a nice gift for h...
【简答题】徐某，男，43岁，工人。1周前咽痛咽干，后突然遍身浮肿，皮肤绷急光亮，胸脘痞闷，烦热口渴，小便短赤，大便干结。查体：T38℃，P84次／分，R18次／分，BP120/80mmHg。眼睑周身浮肿，双肺呼吸音清。心率84次／分，律齐，肝脾未及，双下肢凹陷性水肿。苔薄黄腻，脉沉数。辅助检查：血常规WBC6.8×10 9 /L，N66%。尿常规：PRO（++），BLD（+），RBC20～30/高倍视野。尿...
【单选题】The manager has __________for her to go to the airport to meet an important guest.
A.
asked
B.
sent
C.
called
D.
arranged
相关题目：
参考解析：
知识点：
题目纠错 0
发布
