308f305f3057306e304b305e304f306f304d308730463068306b3059309330673044307e3059。304b305e304f306f父、母、3042306d、304a306830463068、304a3070304230553093、305d30573066308f305f3057306e六人30673059。304a3058304430553093306f八年307e3048306b306a304f306a308a307e3057305f。30613061306f30793093305430573067、母306f小学30533046306e305b3093305b304430673059。3042306d306f二年307e3048306b大学3092305d3064304e3087304630573066、今、30683046304d30873046306e304b3044305730833067306f305f3089304430663044307e3059。一人3067304b304430573083306e308a30873046306b3059309330673044307e3059。304a306830463068306f十七305530443067、308230463059305030533046305330463092305d3064304e308730463057307e3059。3044307e、大学3078306f3044308b305f3081306b30443063305730873046305130933081304430793093304d30873046305730663044307e3059。30573087304630893044304430573083306b306a308a305f304430683044306330663044307e3059。304a3070304230553093306f毎日30443048306730c630ec30d33092見305f308a、本3092308830933060308a305730663044307e3059。308f305f3057305f3061306f毎3070309330573087304f3058306e304230683044306330573087306b30c630ec30d33092307f305f308a、304a306130833092306e30933060308a3057306a304c30893044308d3044308d306f306a3057307e3059。日308830463073306b306f父306e車30673042305d3073306b行3063305f308a、30483044304c3092見306b行3063305f308a3059308b3053306830823042308a307e3059。3068304d3069304d30573093305b3064306e人30843068308230603061304c3042305d3073306b来307e3059。306a306430843059307f306b306f307f3093306a3067308a3087305330463057307e3059。308f305f3057305f3061306f毎日305f306e3057304430673059。304a306d304830553093306f304d308730463068306b3059309330673044307e3059304b。（）
308f305f3057306e304b305e304f306f304d308730463068306b3059309330673044307e3059。304b305e304f306f父、母、3042306d、304a306830463068、304a3070304230553093、305d30573066308f305f3057306e六人30673059。304a3058304430553093306f八年307e3048306b306a304f306a308a307e3057305f。30613061306f30793093305430573067、母306f小学30533046306e305b3093305b304430673059。3042306d306f二年307e3048306b大学3092305d3064304e3087304630573066、今、30683046304d30873046306e304b3044305730833067306f305f3089304430663044307e3059。一人3067304b304430573083306e308a30873046306b3059309330673044307e3059。304a306830463068306f十七305530443067、308230463059305030533046305330463092305d3064304e308730463057307e3059。3044307e、大学3078306f3044308b305f3081306b30443063305730873046305130933081304430793093304d30873046305730663044307e3059。30573087304630893044304430573083306b306a308a305f304430683044306330663044307e3059。304a3070304230553093306f毎日30443048306730c630ec30d33092見305f308a、本3092308830933060308a305730663044307e3059。308f305f3057305f3061306f毎3070309330573087304f3058306e304230683044306330573087306b30c630ec30d33092307f305f308a、304a306130833092306e30933060308a3057306a304c30893044308d3044308d306f306a3057307e3059。日308830463073306b306f父306e車30673042305d3073306b行3063305f308a、30483044304c3092見306b行3063305f308a3059308b3053306830823042308a307e3059。3068304d3069304d30573093305b3064306e人30843068308230603061304c3042305d3073306b来307e3059。306a306430843059307f306b306f307f3093306a3067308a3087305330463057307e3059。308f305f3057305f3061306f毎日305f306e3057304430673059。304a306d304830553093306f304d308730463068306b3059309330673044307e3059304b。（）
设A={a,b,c,d,e}，有一个划分S={{a,b},{c},{d,e}}，由划分S确定A上的一个等价关系R为（ ） A: {〈a,a〉,〈b,b〉,〈c,c〉,〈d,d〉,〈e,e〉,〈a,b〉,〈b,a〉} B: {〈a,a〉,〈b,b〉,〈c,c〉,〈d,d〉,〈e,e〉,〈a,b〉,〈b,a〉,〈d,e〉,〈e,d〉} C: {〈a,a〉,〈b,b〉,〈c,c〉,〈d,d〉,〈e,e〉,〈a,b〉,〈d,e〉,〈e,d〉} D: {〈a,a〉,〈b,b〉,〈c,c〉,〈d,d〉,〈e,e〉, 〈b,a〉,〈d,e〉,〈e,d〉}
设A={a,b,c,d,e}，有一个划分S={{a,b},{c},{d,e}}，由划分S确定A上的一个等价关系R为（ ） A: {〈a,a〉,〈b,b〉,〈c,c〉,〈d,d〉,〈e,e〉,〈a,b〉,〈b,a〉} B: {〈a,a〉,〈b,b〉,〈c,c〉,〈d,d〉,〈e,e〉,〈a,b〉,〈b,a〉,〈d,e〉,〈e,d〉} C: {〈a,a〉,〈b,b〉,〈c,c〉,〈d,d〉,〈e,e〉,〈a,b〉,〈d,e〉,〈e,d〉} D: {〈a,a〉,〈b,b〉,〈c,c〉,〈d,d〉,〈e,e〉, 〈b,a〉,〈d,e〉,〈e,d〉}
308f305f3057306e304b305e304f306f304d308730463068306b3059309330673044307e3059。304b305e304f306f父、母、3042306d、304a306830463068、304a3070304230553093、305d30573066308f305f3057306e六人30673059。304a3058304430553093306f八年307e3048306b306a304f306a308a307e3057305f。30613061306f30793093305430573067、母306f小学30533046306e305b3093305b304430673059。3042306d306f二年307e3048306b大学3092305d3064304e3087304630573066、今、30683046304d30873046306e304b3044305730833067306f305f3089304430663044307e3059。一人3067304b304430573083306e308a30873046306b3059309330673044307e3059。304a306830463068306f十七305530443067、308230463059305030533046305330463092305d3064304e308730463057307e3059。3044307e、大学3078306f3044308b305f3081306b30443063305730873046305130933081304430793093304d30873046305730663044307e3059。30573087304630893044304430573083306b306a308a305f304430683044306330663044307e3059。304a3070304230553093306f毎日30443048306730c630ec30d33092見305f308a、本3092308830933060308a305730663044307e3059。308f305f3057305f3061306f毎3070309330573087304f3058306e304230683044306330573087306b30c630ec30d33092307f305f308a、304a306130833092306e30933060308a3057306a304c30893044308d3044308d306f306a3057307e3059。日308830463073306b306f父306e車30673042305d3073306b行3063305f308a、30483044304c3092見306b行3063305f308a3059308b3053306830823042308a307e3059。3068304d3069304d30573093305b3064306e人30843068308230603061304c3042305d3073306b来307e3059。306a306430843059307f306b306f307f3093306a3067308a3087305330463057307e3059。308f305f3057305f3061306f毎日305f306e3057304430673059。3053306e30723068306e304b305e304f306f307f3093306a3067何人30673059304b。（）
308f305f3057306e304b305e304f306f304d308730463068306b3059309330673044307e3059。304b305e304f306f父、母、3042306d、304a306830463068、304a3070304230553093、305d30573066308f305f3057306e六人30673059。304a3058304430553093306f八年307e3048306b306a304f306a308a307e3057305f。30613061306f30793093305430573067、母306f小学30533046306e305b3093305b304430673059。3042306d306f二年307e3048306b大学3092305d3064304e3087304630573066、今、30683046304d30873046306e304b3044305730833067306f305f3089304430663044307e3059。一人3067304b304430573083306e308a30873046306b3059309330673044307e3059。304a306830463068306f十七305530443067、308230463059305030533046305330463092305d3064304e308730463057307e3059。3044307e、大学3078306f3044308b305f3081306b30443063305730873046305130933081304430793093304d30873046305730663044307e3059。30573087304630893044304430573083306b306a308a305f304430683044306330663044307e3059。304a3070304230553093306f毎日30443048306730c630ec30d33092見305f308a、本3092308830933060308a305730663044307e3059。308f305f3057305f3061306f毎3070309330573087304f3058306e304230683044306330573087306b30c630ec30d33092307f305f308a、304a306130833092306e30933060308a3057306a304c30893044308d3044308d306f306a3057307e3059。日308830463073306b306f父306e車30673042305d3073306b行3063305f308a、30483044304c3092見306b行3063305f308a3059308b3053306830823042308a307e3059。3068304d3069304d30573093305b3064306e人30843068308230603061304c3042305d3073306b来307e3059。306a306430843059307f306b306f307f3093306a3067308a3087305330463057307e3059。308f305f3057305f3061306f毎日305f306e3057304430673059。3053306e30723068306e304b305e304f306f307f3093306a3067何人30673059304b。（）
已知集合A={a,b,c,d,e}，A上的一个划分是：{{a},{b,c},{d,e}}，请写出该划分对应的等价关系R： A: {(a,a),(b,b),(c,c),(d,d),(e,e),(b,c)(c,b),(d,e),(e,d)} B: {(a,a),(b,b),(c,c),(d,d),(e,e),(a,b),(a,c),(b,a),(b,c),(c,a),(c,b),(d,e),(e,d)} C: {(a,a),(b,b),(c,c),(d,d),(e,e),(a,b),(b,a),(d,e),(e,d)} D: {(a,a),(b,b),(c,c),(d,d),(e,e),(b,c),(c,b)}
已知集合A={a,b,c,d,e}，A上的一个划分是：{{a},{b,c},{d,e}}，请写出该划分对应的等价关系R： A: {(a,a),(b,b),(c,c),(d,d),(e,e),(b,c)(c,b),(d,e),(e,d)} B: {(a,a),(b,b),(c,c),(d,d),(e,e),(a,b),(a,c),(b,a),(b,c),(c,a),(c,b),(d,e),(e,d)} C: {(a,a),(b,b),(c,c),(d,d),(e,e),(a,b),(b,a),(d,e),(e,d)} D: {(a,a),(b,b),(c,c),(d,d),(e,e),(b,c),(c,b)}
【单选题】X= {a, b, c, d, e}, A= {a, b, c, d}, R= {(a, a), (b, b), (c, c), (d, d), (e, e), (a, b), (d, c), (b, c ), (a, c), (e, b), (a, d), (e, d), (e, a), (e, c)}, 求(X,R)的cover A. Cover={ ( a, b), (b, c), ( a, d), ( e, a ), ( e, b ) } B. Cover={ ( a, b), (d, c), (b, c), ( a, d), ( e, a )} C. Cover={ ( a, c), (d, c), (b, c), ( a, d), ( e, a )} D. Cover={ ( a, b), (d, c), (b, c ),( a, c), (e, b), ( a, d), (e, d), (e, a), (e, c )}
【单选题】X= {a, b, c, d, e}, A= {a, b, c, d}, R= {(a, a), (b, b), (c, c), (d, d), (e, e), (a, b), (d, c), (b, c ), (a, c), (e, b), (a, d), (e, d), (e, a), (e, c)}, 求(X,R)的cover A. Cover={ ( a, b), (b, c), ( a, d), ( e, a ), ( e, b ) } B. Cover={ ( a, b), (d, c), (b, c), ( a, d), ( e, a )} C. Cover={ ( a, c), (d, c), (b, c), ( a, d), ( e, a )} D. Cover={ ( a, b), (d, c), (b, c ),( a, c), (e, b), ( a, d), (e, d), (e, a), (e, c )}
下面给出的无向图中，为多重图的是（ ）。 A: G=＜V，E＞, 其中V={a, b, c, d, e}，E={（a, c）,（b, e） ,（a, e）,（d, e）} B: G=＜V，E＞, 其中V={a, b, c, d, e}，E={（a, b）,（b, e）,（e, d）,（c, c）} C: G=＜V，E＞, 其中V={a, b, c, d, e}，E={（a, b）,（b, c）,（c, d）,（a, e）} D: G=＜V，E＞, 其中V={a, b, c, d, e}，E={（a, b）,（b, e）,（e, b）,（a, e）,（d, e）}
下面给出的无向图中，为多重图的是（ ）。 A: G=＜V，E＞, 其中V={a, b, c, d, e}，E={（a, c）,（b, e） ,（a, e）,（d, e）} B: G=＜V，E＞, 其中V={a, b, c, d, e}，E={（a, b）,（b, e）,（e, d）,（c, c）} C: G=＜V，E＞, 其中V={a, b, c, d, e}，E={（a, b）,（b, c）,（c, d）,（a, e）} D: G=＜V，E＞, 其中V={a, b, c, d, e}，E={（a, b）,（b, e）,（e, b）,（a, e）,（d, e）}
乳牙萌出顺序正确的是（）。 A: A→B→C→D→E B: A→B→C→E→D C: A→B→D→C→E D: A→C→B→D→E E: A→B→D→E→C
乳牙萌出顺序正确的是（）。 A: A→B→C→D→E B: A→B→C→E→D C: A→B→D→C→E D: A→C→B→D→E E: A→B→D→E→C
设|A|=|B|，|D|=|E|且A∩D=B∩E=，试证明：|A∪D|=|B∪E|．
设|A|=|B|，|D|=|E|且A∩D=B∩E=，试证明：|A∪D|=|B∪E|．
无向图G=(V,E),其中：V={a,b,c,d,e,f},E={(a,b),(a,e),(a,c),(b,e),(c,f),(f,d),(e,d)}，对该图进行深度优先遍历，得到的顶点序列正确的是（）。 A: a,b,e,c,d,fB．a,c,f,e,b,dC．a,e,b,c,f,dD．a,e,d,f,c,b B: a,b,e,c,d,f C: a,c,f,e,b,d D: a,e,b,c,f,d E: a,e,d,f,c,b
无向图G=(V,E),其中：V={a,b,c,d,e,f},E={(a,b),(a,e),(a,c),(b,e),(c,f),(f,d),(e,d)}，对该图进行深度优先遍历，得到的顶点序列正确的是（）。 A: a,b,e,c,d,fB．a,c,f,e,b,dC．a,e,b,c,f,dD．a,e,d,f,c,b B: a,b,e,c,d,f C: a,c,f,e,b,d D: a,e,b,c,f,d E: a,e,d,f,c,b
下列化合物进行硝化反应的活性顺序正确的是: A: (e)>(a)>(b)>(c)>(d) B: (e)>(a)>(c)>(d)>(b) C: (a)>(e)>(c)>(b)>(d) D: (a)>(e)>(c)>(d)>(b) E: (e)>(a)>(c)>(b)>(d)
下列化合物进行硝化反应的活性顺序正确的是: A: (e)>(a)>(b)>(c)>(d) B: (e)>(a)>(c)>(d)>(b) C: (a)>(e)>(c)>(b)>(d) D: (a)>(e)>(c)>(d)>(b) E: (e)>(a)>(c)>(b)>(d)