公安赔偿是公安机关及其人民警察违法行使职权，侵犯公民的合法权益造成损害，由国家承担的

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北大毕业生卖猪肉称“给母校丢了脸”

“我给母校丢了脸、抹了黑，我是反面教材。”因干上杀猪一行而闻名的北京大学毕业生陆步轩昨天站上母校的讲台，说完这第一句话，几乎哽咽。

陆步轩是受自己的母校——北大就业指导中心邀请，来到“北大职业素养大讲堂”的讲台的。2003年，陆步轩以“眼镜肉店”老板的身份卖猪肉，被媒体关注，引起社会争论甚至批评。昨天，陆步轩分享了自己就业和创业的坎坷：

他说，毕业多年，北大的活动他都没有参加。2004年前后，他才第一次参加同学聚会。昨天，是他第一次接受北大官方的邀请。到现在，陆步轩仍然觉得卖猪肉不体面，自己“混得差”。但现场的近四成同学称如果找不到合适的工作，卖猪肉的工作也可以考虑。

你如何看待陆步轩对自身的评价？请简述理由。100字以内。（5分）

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在向后弯曲的个人劳动力供给曲线上，具有正斜率的向右上方倾斜的部分表示( )。

A．工资率上升对劳动力供给的替代效应大于收入效应

B．劳动者愿意提供的工作时间减少

C．工资率上升对劳动力供给的收入效应大于替代效应

D．劳动者更愿意享受闲暇

在科技馆中的水平地面上有一个质量为4kg的物体，在与水平方向成37°角的斜向上的拉力F作用下，从静止开始运动，经过一段时间后撤去拉力F，又经过一段时间后，物体停止运动。工作人员用先进的仪器测量数据并用电脑描绘出物体全过程的v-t图像如图所示，很快计算出了地面的动摩擦因数，请你利用学过的知识求解：物体与地面的动摩擦因数为多大？拉力F为多大？

Mr. Faugel was convinced that student nervousness had affected their scores; to reduce the anxiety of these students who had already been tested, he gave 22 of them a beta blocker before readministration of the test. Their scores improved significantly. The other 8 students (who did not receive the beta blockers) improved only slightly. Second-time test-takers nationwide had average improvements which were similar to those in Faugel’’s non-beta blocker group. Beta blockers are prescription drugs which have been around for 25 years. These medications, which interfere with the effects of adrenalin, have been used for heart conditions and for minor stress such as stage fright. Now they are used for test anxiety. These drugs seem to help test-takers who have low scores because of test fright, but not those who do not know the material. Since there can be side effects from these beta blockers, physicians are not ready to prescribe them routinely for all test-takers.

Beta blockers work on some physical and emotional symptoms because they________.

A．fool a person into a healthier stance

B．interfere with the effects of adrenalin

C．produce side effects worse than the symptoms

D．primarily change human thought processes

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