【单选题】Suppose we have the relation schema R( A, B, C, D)with functional dependencies; F{A→B,B→C,C→D,D→A}, then R(A,B,C,D. at least is in(73).
D.
BCNFThe construct eobegin Statement1; Statement2; coend means Statement1 and Statement2 are to be executed in parallel. The only two atomic actions in this construct are loading the value of a variable and storing into a variable. For the p
【多选题】存在稀释性潜在普通股计算每股收益时,以下表述正确的有______。
A.
多项稀释性潜在普通股应按照其稀释程度从大到小的顺序计入稀释每股收益中
C.
以前期间发行的稀释性潜在普通股应假设在当期期初转换为普通股
D.
当期发行的稀释性潜在普通股应假设在发行日转换为普通股
【多选题】小图想要在图书馆自助复印一份论文,你能告诉他该去哪里吗?
【单选题】Suppose we have two relations R(A,B,C) and S(B,C,D) ,then the attributes number of the result of R÷S is:
【单选题】For the relation Apply(SSN,cName,state,date,major), suppose college names are unique and students may apply to each college only once, so we have two FDs: cName → state and SSN,cName → date,major. Is ...
【判断题】转账缴税是指纳税人根据税务机关填制的税收缴款书,通过开户银行转账缴纳税款的方式。
【简答题】已经知道每个正常人的体细胞中都含有23对染色体.如图是人类生殖过程中染色体变化示意图,请据图回答问题: (1)请在图中画出精子、卵细胞、受精卵细胞中的染色体和基因. (2)在形成精子(或卵细胞)过程中,体细胞每对染色体中的______条进入精子(或卵细胞),人体的正常受精卵中含有______条染色体. (3)若图中所示的是一对性染色体,父方体细胞中性染色体组成为______,母方卵细胞的染色体组成...
【判断题】Suppose we operate a company that produce two kinds of products: shirts and jeans. As we continue to increase production level of shirt, each additional shirt we produced will have fixed opportunity c...