An external consultant must work with some System experts.
A．Right
B．Wrong
C．Doesn't say
－－Must we finish our homework now? －－No, you ______. You _______ finish it after school.A.needn't , mayB.mustn't , mayC.can't , canD.needn't , must
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“Must I finish my homework now?” “No, you() . But you() finish it this evening. ”A. mustn’ t…mustB. needn’ t…mustC. can’ t…canD. can’ t…must
There are ______ books in your bag. But there aren’t ______ pens in it.A、some, someB、any ,someC、some, anyD、any,any
classWorkimplementsRunnable{Threadother；Work（Threadother）{this.other=other；}publicvoidrun（）{try{other.join（）；}catch（Exceptione）{}System.out.print（"afterjoin"）；}}classLaunch{publicstaticvoidmain（String[]args）{newThread（newWork（Thread.currentThread（）））.start（）；System.out.print（"afterstart"）；}}结果为：（）A.afterjoinB.afterstartC.afterjoinafterstartD.afterstartafterjoin
public static void main（String[]args）{String str="null"；if（str==null）{System.out.println（"null"）；}else（str.length（）==0）{System.out.println（"zero"）；}else{System.out.println（"some"）；}}What is the result？（）A.nullB.zeroC.someD.Compilationfails.E.Anexceptionisthrownatruntime.
publicstaticvoidmain(String[]args){Stringstr=null?;if(str==null){System.out.println(”null”);}else(str.length()==0){System.out.println(”zero”);}else{System.out.println(”some”);}}Whatistheresult?()A.nullB.zeroC.someD.Compilationfails.E.Anexceptionisthrownatruntime.
GiventhatastaticmethoddoIt（）inaclassWorkrepresentsworktobedone，whatblockofcodewillsucceedinstartinganewthreadthatwilldothework？CODEBLOCKa：Runnabler=newRunnable（）{publicvoidrun（）{Work.doIt（）；}}；Threadt=newThread（r）；t.start（）；CODEBLOCKb：Threadt=newThread（）{publicvoidstart（）{Work.doIt（）；}}；t.start（）；CODEBLOCKc：Runnabler=newRunnable（）{publicvoidrun（）{Work.doIt（）；}}；r.start（）；CODEBLOCKd：Threadt=newThread（newWork（））；t.start（）；CODEBLOCKe：Runnablet=newRunnable（）{publicvoidrun（）{Work.doIt（）；}}；t.run（）；
