试题与答案

儿童如果长期不注意坐、立、行走的正确姿势,就会引起脊柱变形,这是因为他们骨的特点

题型:选择题

题目:

儿童如果长期不注意坐、立、行走的正确姿势,就会引起脊柱变形,这是因为他们骨的特点是     ……………………………………………………………  (   )

A.弹性小,硬度小,容易变形

B.弹性大,硬度小,容易变形

C.弹性大,硬度大,容易变形

D.弹性小,硬度大,不容易变形

答案:

答案:B

分析:骨的成分包括有机物和无机物,物理特性表现为弹性和硬度上,据此答题.

解答:解:骨的成分包括有机物和无机物,物理特性表现为弹性和硬度上,各年龄段的成分如下表:

所以在儿童青少年时期,骨的成分中有机物的比例比较多,骨的弹性大,硬度小,容易变形.

故选:B

点评:骨的成分中有机物的比例越多,其弹性越大,硬度越小.

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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.

According to the views of psychologists (Para 4, line 2), narcissists would()

A. make themselves feel adequate

B.show their differences

C. obtain the respect of others

D.defense against feeling insufficient

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