Which of the following is true of an index used to support a UNIQUE constraint?（）
1、Which of the following is true of Rae
Which of the following is true of Rae Armantrout?A She published a poetry textbook.B She used to teach Denise Levertov.C She started a poets’ group with others.D She taught creative writing at UC Berkeley.
2、Which of the following is true of the
Which of the following is true of the OECD report?AIt criticizes government-funded research.BIt introduces an effective means of publication.CIt upsets profit-making journal publishers.DIt benefits scientific research considerably.
3、Which of the following is not true of
Which of the following is not true of Ireland.s climate?（）AIt is dry.BIt is moist.CIt is mild.DIt is changeable
4、24． Which of the following is TRUE?
24． Which of the following is TRUE?A When he talks or sings, Jay Chou can both speak clearly．B When he sings, Jay Chou can-t speak clearly...
5、Which of the following is true ?
Which of the following is true ?A In different countries, the manners are the same .B Different manners in different countries .C Good manners are not important .D In Arabic countries we mustn’t be careful with our hands .
6、Which of the following is not true of
Which of the following is not true of the European Union?（）AThe United States is also a member of the EU.BThe members of the EU cooperate ...