皮皮学，免费搜题
登录
搜题
【简答题】
Rosa was praise by the teacher because her art project was so creative. Rebecca told us most of the story but the bit about herself because she didn't want to make her good deed known. The local people tell me it is impossible to climb up to the top of the snowy mountain. Marilyn Monroe went to Hollywood fame and fortune. In Heaven let us be two birds flying ever together, and two trees with branches interlocked forever. Last but not least, I would like to thank all of you, and the Chairman, Dr. Rogers, for his full support over the last three years. Oliver is a respected engineer, manager and teacher, but he is a kind father and loving husband, which is something he takes great pride in. When he what was happening and realized something was wrong, he decided to get away quickly.
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
【单选题】She really wanted to say something at the meeting, but eventually______from it.
A.
refrained
B.
prevented
C.
limited
D.
restricted
【单选题】Since she’s on a diet, Stella refrained from eating a second piece of carrot cake.
A.
to stop oneself
B.
to return
C.
to keep going
D.
to evaluate
【简答题】A．πA,B,C(σA＜C(R×S)) B．πR.A,R.B,R.C(σR.A＜S.B(R×S)) C．πR.A,S.B,S.C(σR.A＜S.C(R×S) D．πS.A,S.B,R.C(σR.A＜S.C(R×S))
【简答题】设A={a，b，c}，A上的关系R和S定义如下： R={〈a，b〉，〈b，b〉，〈b，c〉}，S={〈a，c〉，〈b，c〉，〈c，c〉}， 求关系R∪S，R∩S，R-S，S-R，R S．
【简答题】She refrained from laughing.
【简答题】She refrained from laughing.
相关题目：
参考解析：
知识点：
题目纠错 0
发布
