下列运算符中不能在C++中重载的是( )。A.: B.+ C.- D.<=

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问题:

下列运算符中不能在C++中重载的是( )。

A.:

B.+

C.-

D.<=

考点:计算机等级考试C++二级C++笔试
题型:单项选择题

可以通过( )的方法来输出一个二维数组中的各个元素。

A.引用数组的两个下标

B.将数组名赋值给变量

C.通过引用数组的一个下标

D.以上都不正确

题型:单项选择题

道具的急剧磨损阶段的磨损速度快的原因是( )。

A.表面退火

B.便面硬度低

C.摩擦力增大

D.以上均可能

题型:单项选择题

DCS系统组成有什么设备?

题型:单项选择题

Social-networking sites offer users easy ways to present idealized images of themselves, even if those ideals don’t always square with their real-world personalities. Psychology researcher Soraya Mehdizadeh has discovered a way to poke through the offline-online curtain: she has used Faeebook to predict a person’s level of narcissism and self-esteem.

Mehdizadeh, who conducted the study as an undergraduate at Toronto’s York University, gained access to the Faeebook accounts of 100 college students and measured activities like photo sharing, wall postings and status updates; she also studied how frequently users logged on and how often they remained online during each session. Her findings were published recently in Cyberpsyehology, Behavior and Social Networking.

After measuring each subject using the Narcissism Personality Inventory and Rosenberg Self-Esteem Scale, Mehdizadeh, who graduated from York this past spring, discovered narcissists and people with lower self-esteem were more likely to spend more than an hour a day on Facebook and were more prone to post self-promo-tional photos ( striking a pose or using Photoshop, for example). Narcissists were also more likely to showcase themselves through status updates (using phrases like "I’m so glamorous I bleed glitter") and wall activity (posting self-serving links like " My Celebrity Look-alikes" ).

Self-esteem and narcissism are often interrelated but don’t always go hand in hand. Some psychologists believe that narcissists--those who have a pervasive pattern of grandiosity, a need for admiration, as well as a lack of sympathy--unconsciously inflate their sense of self-importance as a defense against feeling inadequate. Not enough empirical research has been produced to confirm that link, although Mehdizadeh’s study seems to support it. Because narcissists have less capacity to sustain intimate or long-term relationships, Mehdizadeh thinks that they would be more drawn to the online world of virtual friends and emotionally detached communication.

Although it seems that Facebook can be used by narcissists to fuel their inflated egos, Mehdizadeh stops short of proclaiming that excessive time spent on Faeebook can turn regular users into narcissists. She also notes that social-networking sites might ultimately be found to have positive effects when used by people with low self-esteem or depression. "If individuals with lower self-esteem are more prone to using Facebook," she says, "the question becomes, ’ Can Facebook help raise self- esteem by allowing patients to talk to each other and help each other in a socially interactive environment’ I don’t think it’s necessarily a bad thing that people with low self-esteem use Facebook.

Facebook’s users()

A.like to hide themselves

B.maybe show the characters that are different from the real ones

C. (are more likely to) upload the modified photos

D. are often used as the research

题型:单项选择题

压裂施工为使地层裂缝不闭合,采用的方法是()。

A.提高压裂力

B.延长压裂时间

C.多注入压裂液

D.注入高强度固体颗粒

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