A: Objects A and C possess charges of the same sign.
B: Objects A and C possess charges of opposite sign.
C: All three objects possess charges of the same sign.
D: One object is neutral.
E: Additional experiments must be performed to determine information about the charges on the objects.
举一反三
- Which of the following statements are true？（） A: The equals（） method determines if reference values refer to the same object. B: The == operator determines if the contents and type of two separate objects match. C: The equals（） method returns true only when the contents of two objects match. D: The class File overrides equals（） to return true if the contents and type of two separate objects match.
- Which three objects can be components of a menu module?（） A: windows B: parameters C: object groups D: report objects E: visual attributes
- Aristotle thinks types differ from one another in three ways: the means, objects and _____.
- Objects have the property of ______ —although objects may know how to commu- nicate with one another across well-defined interfaces, they normally are not allowed to know how other objects are implemented.
- Which three objects can be components of a menu module?（） A: Awindows B: Bparameters C: Cobject groups D: Dreport objects E: Evisual attributes
内容
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Which statement is true？（） A: Compilation fails because the hashCode method is not overridden. B: A HashSet could contain multiple Person objects with the same name. C: All Person objects will have the same hash code because the hashCode method is not overridden. D: If a HashSet contains more than one Person object with name="Fred"， then removing another Person， also with name="Fred"， will remove them all.
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The main task of object-oriented analysis (OOA) is to ________ A: build the logical model using objects as basic units B: make users’ information requirements clear C: determine the overall plan of the system D: identify objects together with their attributes and operations
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DAO指的是：（） A: Data Access Objects B: Delete Access Objects C: Date Access Operato D: Date Access Objects
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The objective of image interpretation is: A: Identification and recognition of objects B: Measuring the thickness of objects C: Estimate the age of the objects D: None of the above
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What is Mr. Freeman’s demand for students’ objects? Para. 10() A: make their objects say something, B: make their objects express an emotion, C: make their objects speak to every person looking at it