Goodmorning,America.Congratulationstoalltheyoungpeopleacrossthiscountrywhoare1thecollegethisfall,particularlythoseofyouwhoarethefirstinyourfamiliesto2yourhighereducation.Iamsoproudofyoubecauseasa3collegegraduatemyself,Iknowitisnoteasytogettothispoint.BackwhenIfirstarrivedatcollegeIhadplentyofmomentsof4.Istruggletofindmycommunity,choosemyclasses,Ididn'tevenknow5toputonmybed.ButbeforelongIstartedto6.IdiscoveredsubjectsIwas7,ImakefriendsIlovedandIwanttohavethecareerthatI8inpublicserviceandasyoupreparetostartyourowncollege,Iwanttogiveyouafewpiecesofadvice.First,9.Themissioncommitteesawsomethingspecialinyouandtheywereconfidentthatyoucouldsucceed.That'swhytheyacceptyou.Sodon'twasteanytime10whetheryoubelong,instead,putthatenergyintheworkandhardandlearning.Learnasmuchasyoucan.Second,11.Theseyearsareapreciousopportunitytodiscoverwhoyouareandwhatyoulovedoing.Sobebravetakesomerisksmakesomemistakesandthenlearnfromthem.Third,12.Findthecommunitytosupportyou.Findprofessorsto13youanddon'teverbeafraidtoseekout.deans,counselors,tutors,RAs.Andaskforhelpwhenyouneedit.That'stheirjob,that'swhythey’rethere.Theyaretheretohelpyou.Finally,14.Peoplewhoare15youoneverystepofthewayandIwantyoutoknowthattheBarackandIareproudofallofyou,andwecan'twaittoseeeverythingyougoontoachieve.Socongratulationsagain,keepreachinghigher,andgoodluck.
举一反三
- 【单选题】myarray1=np.arange(15) myarray2=myarray1.reshape(5,3) print( myarray1) print(myarray2) 输出值是? A. [ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15] [[ 0 1 2] [ 3 4 5] [ 6 7 8] [ 9 10 11] [12 13 14]] B. [ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15] [[ 1 2 3] [ 4 5 6] [ 7 8 9] [10 11 12] [13 14 15]] C. [ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14] [[ 0 1 2] [ 3 4 5] [ 6 7 8] [ 9 10 11] [12 13 14]] D. [ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14] [[ 1 2 3] [ 4 5 6] [ 7 8 9] [10 11 12] [13 14 15]]
- 设DES加密算法中的一个S盒为： 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 14 4 13 1 2 15 11 8 3 10 6 12 5 9 0 7 0 15 7 4 14 2 13 1 10 6 12 11 9 5 3 8 4 1 14 8 13 6 2 11 15 12 9 7 3 10 5 0 15 12 8 2 4 9 1 7 5 11 A: 1010 B: 0001 C: 1011 D: 0111
- 已知S盒如下表，若输入为100010，则二进制输出为（ ） [br][/br] 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 7 13 14 3 0 6 9 10 1 2 8 5 11 12 4 15 1 13 8 11 5 6 15 0 3 4 7 2 12 1 10 14 9 2 10 6 9 0 12 11 7 13 15 1 3 14 5 2 8 4 3 3 15 0 6 10 1 13 8 9 4 5 11 12 7 2 14 A: 0110 B: 1001 C: 0100 D: 0101
- 说明S盒变换的原理，并计算当输入为110101时的S1盒输出。 [br][/br] n\m 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 S1 0 14 4 13 1 2 15 11 8 3 10 6 12 5 9 0 7 1 0 15 7 4 14 2 13 1 10 6 12 11 9 5 3 8 2 4 1 14 8 13 6 2 11 15 12 9 7 3 10 5 0 3 15 12 8 2 4 9 1 7 5 11 3 14 10 0 6 13
- 设DES加密算法中的一个S盒为： 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 14 4 13 1 2 15 11 8 3 10 6 12 5 9 0 7 0 15 7 4 14 2 13 1 10 6 12 11 9 5 3 8 4 1 14 8 13 6 2 11 15 12 9 7 3 10 5 0 15 12 8 2 4 9 1 7 5 11 3 14 10 0 6 13 若给定输入为101101，则该S盒的输出的二进制表示为