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This plant needs watering twice a week.()
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“________have you visited the Great Wall?” “Twice.”
A.How soonB.How oftenC.How many timesD.How long
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定义类：packageutils；publicclassRep{publicstaticStringtwice（Strings）{returns+s；}}再定义另一个类Demo：//insertcodeherepublicclassDemo{publicstaticvoidmain（String[]args）{System.out.println（twice（Hello））；}}在第一行插入哪项代码，可以使程序正常编译和执行？（）A.importutils.*；B.importutils.Rep.*；C.importstaticutils.Rep.twice；D.staticimportutils.Rep.twice；
考题
GivenaclassRepetition：1.packageutils；2.3.publicclassRepetition{4.publicstaticStringtwice（Strings）{returns+s；}5.}andgivenanotherclassDemo：1.//insertcodehere2.3.publicclassDemo{4.publicstaticvoidmain（String[]args）{5.System.out.println（twice（”pizza”））；6.}7.}Whichcodeshouldbeinsertedatline1ofDemo.javatocompileandrunDemotoprintpizzapizza”？（）A.importutils.*；B.staticimportutils.*；C.importutils.Repetition.*；D.staticimportutils.Repetition.*；E.importutils.Repetition.twice（）；F.importstaticutils.Repetition.twice；G.staticimportutils.Repetition.twice；
考题
publicclassPlant{privateStringname;publicPlant(Stringname){this.name=name;}publicStringgetName(){returnname;}}publicclassTreeextendsPlant{publicvoidgrowFruit(){}publicvoiddropLeaves(){}}Whichistrue?()
A.Thecodewillcompilewithoutchanges.B.ThecodewillcompileifpublicTree（）{Plant（）；}isaddedtotheTreeclass.C.ThecodewillcompileifpublicPlant（）{Tree（）；}isaddedtothePlantclass.D.ThecodewillcompileifpublicPlant（）{this（”fern”）；}isaddedtothePlantclass.E.ThecodewillcompileifpublicPlant（）{Plant（”fern”）；}isaddedtothePlantclass.
考题
Given a class Repetition:Which code should be inserted at line 1 of Demo.java to compile and run Demo to print pizzapizza?()
A.import utils.*;B.static import utils.*;C.import utils.Repetition.*;D.static import utils.Repetition.*;E.import utils.Repetition.twice();F.import static utils.Repetition.twice;G.static import utils.Repetition.twice;
考题
____twice,thepostmanrefusedtodeliverourlettersunlesswechangedourdog.A.BeingbittenB.BittenC.HavingbittenD.Tobebitten
考题
__________twice, the postman refused to deliver our letters unless we chained our dog.A.Being bitten
B.Bitten
C.Having bitten
D.To be bitten
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