头孢呋辛（）A．可以通过胎盘影响胎儿 B．可以通过乳汁影响婴儿 C．两者均可以 D．

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.

which of the following is used for predicting a person’s level of narcissism and self-esteem（）

A. Activities the subjects take apart in

B. Frequency of the experimental object

C. Frequency of the experimental object’s renewing photos

D. The contents of the log of the experimental object

I.根据反应3Cu+8HNO₃  3Cu(NO₃)₂+2NO↑+4H₂O，回答下列问题：

（1）氧化剂是　　　，       元素被氧化；

（2）用“双线桥”表示该反应电子转移的方向和数目：

3Cu+8HNO₃=3Cu(NO₃)₂+2NO↑+4H₂O

（3）当有2 mol HNO₃被还原时，被氧化的物质的质量为　　　，转移的电子数为　　；

II. 有下列6种物质：K₂SO₄、K₂SO₃、I₂、H₂SO₄、KIO₃、H₂O组成一个氧化还原反应，已知在反应中K₂SO₃失去电子。请将这6种物质组成一个化学方程式（需配平）：

2002年9月26日，中国北京曙光公司研制出了第一款具有我国完全自主知识产权的高性能CPU                                 芯片— “龙芯”1号。该芯片中主要成分可以制成计算机长距离联网传输的线路材料，这种埋在地下的材             料如果裸露在碱性土壤中，结果会断路，用离子方程式说明原因                   

上肢血压测量法，下述哪项不妥：

A．测量前让病人休息15min

B．病人坐位时肱动脉平第四肋软骨

C．将病人的衣袖卷至肩部

D．袖带平整缠在上臂下部

E．袖带松紧度以能放入一指为宜

T℃时，在1L密闭容器中A气体与B气体反应生成C气体。反应过程中A、B、C浓度变化如图I所示；若保持其他条件不变，温度分别为T_l和T₂时，B的体积百分含量与时间的关系如图Ⅱ所示。则下列结论正确的是

A．在达平衡后，保持其他条件不变，增大压强，平衡向逆反应方向移动

B．在达平衡后，保持压强不变，通入稀有气体，平衡向正反应方向移动

C．保持其他条件不变，若反应开始时A、B、C的浓度分别为0.4mo1·L^-1、0.5 mo1·L^-1和0.2 mo1·L^—1，则达到平衡后，C的浓度大于0.4 mo1·L^-1

D．保持其他条件不变，升高温度，正、逆反应速率均增大，且A的转化率增大

煤焦油经分离可得（）、（）、（）等。