A. Massachusetts Institute of Technicology B. Manchester Institute of Technology C. Massachusetts Institute of Technology D. Machester Institute of Technicology 参考答案:C
第2题: [填空题]A. clock B. nurse C. housework D. sofa E. hospital F. sport G. factory
It is a large and soft seat with arms and a back. 参考答案:D
第25题: [填空题]设供应商供应零件的关系模式为SP(Sno,Pno,Qty),其中Sno表示供应商号,Pno表示零件号,Qty表示零件数量。现查询至少包含了供应商“168”所供应的全部零件的供应商号。请补全下列SQL语句: ______ FROM SP SPX WHERE______ (SELECT* FROM SP SPY WHERE______ AND NOT EXISTS (SELECT* FROM SP SPZ WHERE______)) 参考答案:SELECT Sno NOT EXISTS SPY.Sno=’168’ SPZ.Sno=SPX.Sno AND SPZ.Pno=SPY.Pno