Whichstatementsconcerningthevalueofamembervariablearetrue,whennoexplicitassignmentshavebeenmade?()
A. Thevalueofanintisundetermined.
B. Thevalueofallnumerictypesiszero.
C. Thecompilermayissueanerrorifthevariableisusedbeforeitisinitialized.
D. ThevalueofaStringvariableis""(emptystring).
E. Thevalueofallobjectvariablesisnull.
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Giventhefollowingcodefragment:publicvoidcreate(){VectormyVect;myVect=newVector();}Whichofthefollowingstatementsaretrue?()
A. Thedeclarationonline2doesnotallocatememoryspaceforthevariablemyVect.
B. Thedeclarationonline2allocatesmemoryspaceforareferencetoaVectorobject.
C. Thestatementonline2createsanobjectofclassVector.
D. Thestatementonline3createsanobjectofclassVector.
E. Thestatementonline3allocatesmemoryspaceforanobjectofclassVector.
提高对学习的认识,增强自觉性就是要进一步()。
A. 增强理论学习的自觉性
B. 增强理论学习的持久性
C. 认识理论学习的重要性
D. 提高理论学习的积极性
终身学习观念包括:()。
A. 树立学习是的工作观念
B. 树立学习是创新的观念
C. 树立学习是竞争力的观念
D. 树立学习是生活的观念
对于脆性材料,抗压强度极限比抗拉强度极限高出许多。()