一个物体的体积为200cm3，将其体积的二分之一浸没在水中时，它受到的浮力是__

除非另有规定，计算面积时，其长、宽应按照图纸所示尺寸线或按监理人指示计量

工作台液压缸内存有空气会引起（）．

A．系统发热

B．液压缸损坏

C．工作台爬行

当索赔事件持续进行时，承包人应( )。

A．视影响程度，不定期地提出中间索赔报告

B．在事件终了后，一次性提出索赔报告

C．阶段性发出索赔意向通知，索赔事件终止后28天内，向工程师提供索赔的有关资料和最终索赔报告

D．阶段性提出索赔报告，索赔事件终止后14天内，向工程师提供索赔的有关资料

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.

20（）

A.what

B.whom

C.when

D.which

销售员必备的销售工具通常指（）。

A.名片夹、通讯录、笔记用具

B.计算器、价格表、购销合同

C.公司介绍，汽车目录

D.相关小礼品