化简：-[-（-x2）-y2]+（-x）2+（-y2）=______．

What is your favourite colour? Do you like yellow, orange, red?   小题1:  Do you prefer greys and blues? Then you are probably quiet, shy, and you would rather follow than lead. You tend to be pessimist. At least, this is what psychologists tell us, and they should know, because they have been seriously studying the meaning of colour preference, as well as the effect that colours have on human beings.   小题2:  If you happen to love brown, you did so, as soon as you opened your eyes, or at least as soon as you could see clearly.

  小题3:  A yellow room makes most people feel more cheerful and more relaxed than a dark green one; and a red dress brings warmth and cheer to the saddest winter day.   小题4:  A black bridge over the Thames River, near London, used to be the scene of more suicides than any other bridge in the area ------ until it was repainted green. The number of suicide attempts immediately fell sharply. Perhaps it would have fallen even more if the bridge had been done in pink or baby blue.

  小题5:  It is an established fact that factory workers work better, harder, and have fewer accidents when their machines are painted orange rather than black or grey.

A．They tell us, among other facts, that we do not choose our favourite colour as we grow up ----- we are born with our preference.

B．On the other hand, black is depressing.

C．If you do, you must be an optimist, a leader, an active person who enjoys life, people and excitement.

D．Light and bright colours make people not only happier but more active.E. Life is like a picture or a poem, full of different colours.

F. Colours do influence our moods---there is no doubt about it.

G. The rooms are painted in different colours as you like.

某一只基金2年的累计收益率为36%，那么该基金的年平均收益率为（）。

A.17.8%

B.18%

C.6%

D.16.6%

某县城一生产企业为增值税一般纳税人。本期进口原材料一批，向海关缴纳进口环节增值税10万元；本期在国内销售甲产品缴纳增值税30万元、消费税50万元，由于缴纳消费税时超过纳税期限10天，被罚滞纳金1万元；本期出口乙产品一批(实行免、抵、退)，按规定退回增值税5万元。该企业本期应缴纳城建税( )万元。

A．4.55万元

B．4万元

C．4.25万元

D．5.6万元

[案例十七]患者，男性，48岁。因进食海鲜1天后出现右足趾及趾跖关节剧烈疼痛，伴红肿，有发热。既往发作过两次，每次发作1周左右可自行缓解，曾用过青霉素治疗效果不明显。查体：痛苦面容，呻吟。体温39.2℃，右足趾及趾跖关节红肿、压痛，局部皮温增高。血白细胞11.4×10⁹/L，中性粒细胞0.88，血尿酸630μmol/L。

目前抑制尿酸合成的药物主要是

A．苯溴马隆

B．丙磺舒

C．磺吡酮

D．别嘌醇 E．吲哚美辛 F．糖皮质激素

简述相邻关系的法律特征。