原发性妄想

小小阅览室。

　　小蚂蚁差不多奔波了一天，也没有找到一点食物。它想：“寻找食物可真困难！我已经厌恶劳动了。”

1．蚂蚁心里是怎么想的？用“______”在文中画出来。

2．小蚂蚁有这种想法多不好啊！你能劝劝它吗？

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下列关于经营杠杆表述不正确的是( )。

A．高经营杠杆行业需要获得更高的销售量来维持利润

B．经营杠杆是营业利润相对于销售量变化敏感度的指示剂

C．政府会使某些经营杠杆较高的行业成为垄断行业

D．通常情况下，高经营杠杆代表着低风险

（10分）如图2所示，半径为r的绝缘细圆环的环面固定在水平面上，场强为E的匀强电场与环面平行。一电量为+q、质量为m的小球穿在环上，可沿环作无摩擦的圆周运动，若小球经A点时，速度v_A的方向恰与电场垂直，且圆环与小球间沿水平方向无力的作用，试计算：

（1）小球运动达到最大速度的位置(半径与竖直方向成的角度θ用字母表示)

(2) 速度v_A的大小；

（3）小球运动到与A点对称的B点时，对环在水平方向的作用力。

对于投资方案来说，只有增量现金流量才是相关现金流量。（）

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.

1（）

A.old

B.changeable

C.young

D.depressed