搜题请搜索小程序“爱下问搜题”
问题 选择题

在25℃ 101kPa下，白磷（化学式为P4）、红磷（化学式为P）燃烧的热化学方程式分别为

P4（s）+5O2（g）= P4O10（s）；△H = －3093.2 kJ/mol，

4P（s）+5O2（g）= P4O10（s）；△H = －2954.0 kJ/mol，

由此判断，下列说法正确的是[ ]

A．由红磷转化为白磷是吸热反应，等质量时红磷能量比白磷高

B．由红磷转化为白磷是放热反应，等质量时红磷能量比白磷低

C．由红磷转化为白磷是放热反应，等质量时红磷能量比白磷高

D．由红磷转化为白磷是吸热反应，等质量时红磷能量比白磷低

答案

答案：D

单项选择题

甲状腺131I试验饮食，下列说法正确的是()

A．协助诊断甲状腺功能

B．试验期前七天禁用含碘食物

C．试验期为1周

D．不需禁止局部皮肤碘消毒

E．4周后做131I机能测定
查看答案
单项选择题

Are teens and young adults more narcissistic (自恋的) today than in the past That’s the view of a California researcher who studies (1) people.

In her new book, The Narcissism (2) : Living in the Age of Entitlement, psychologist Jean Twenge of San Diego State University and (3) W. Keith Campbell of the University of Georgia say research shows (4) young people today have "narcissistic traits" than in (5) generations. Such traits, Twenge says, include a very. (6) and inflated sense of self, which is (7) by a preoccupation with MySpace, Facebook and YouTube.

"We’ve been on this self-admiration cultural (8) for a long time," Twenge says. (9) Twenge’s take on today’s young people isn’t universal. Studies by other researchers, including Canadian (10) Dr. Kali of the University of Western Ontario, have used the same data but found (11) results. "They put a different (12) on it," Kali says.

Twenge’s studies have found more narcissistic traits and a (13) rate of increase among college students today, but Kali found that students’ narcissism was (14) greater in 2006 than in 1976. Twenge’s most recent paper studied the same data as Kali--more than 20 000 college students from 2002 to 2007. (15) researchers used the Narcissistic Personality Inventory to measure narcissistic (16) and findings by both have been (17) in peerreviewed journals.

Twenge’s book (18) just a month after The Mirror Effect : How Celebrity Narcissism Is Seducing America, a book co-written by behavioral (19) Drew Pinsky, (20) suggested that a celebrity-obsessed culture is causing more narcissism.

10（）

A.psychologist

B.archaeologist

C.philosopher

D.physicist
查看答案