信号联锁系统的误动作是指工艺生产和设备均在正常进行，由于自身的问题使（）或（）误动作

一个工艺品盒的长是3分米，宽是2分米，高是1分米，现将3个这样的工艺品盒包装在一起（仍为长方体）。    

（1）你能想出几种包装方法？请画草图表示两种不同的包装方法。 

（2）想一想，怎样包装最省包装纸？并计算所用的包装纸的面积。（包装纸重叠处忽略不计）

汶川地震发生后，很多家长带着孩子去募捐，就是为了感染、教育孩子，让他们

做个有爱心的人。这说明爱心是

A．需要启迪、培养的

B．先天就有的

C．惊天动地的

D．当他人遇到困难时捐点钱就行了

People diet to look more attractive．Fish diet to avoid being beaten up，thrown out of their social group，and getting eaten as a result．That is the fascinating conclusion of the latest research into fish behavior by a team of Australian scientists．

　　The research team have discovered that subordinate(低一等的) fish voluntarily diet to avoid challenging their larger competitors．"In studying gobies we noticed that only the largest two individuals，a male and female，had breeding（繁殖）rights within the group，" explains Marian Wong．"All other group members are nonbreeding females，each being 5-10% smaller than its next largest competitor．We wanted to find out how they maintain this precise size separation．"

　　The reason for the size difference was easy to see．Once a subordinate fish grows to within 5-10% of the size of its larger competitor，it causes a fight which usually ends in the smaller goby being driven away from the group．More often than not，the evicted fish is then eaten up．

　　It appeared that the smaller fish were keeping themselves small in order to avoid challenging the boss fish．Whether they did so voluntarily，by restraining how much they ate，was not clear．The research team decided to do an experiment．They tried to fatten up some of the subordinate gobies to see what happened．To their surprise，the gobies simply refused the extra food they were offered，clearly preferring to remain small and avoid fights，over having a feast．

　　The discovery challenges the traditional scientific view of how boss individuals keep their position in a group．Previously it was thought that large individuals simply used their weight and size to threaten their subordinates and take more of the food for themselves，so keeping their competitors small．

　　While the habits of gobies may seem a little mysterious，Dr．Wong explains that understanding the relationships between boss and subordinate animals is important to understand how hierarchical（等级的）societies remain stable．

　　The research has proved the fact that voluntary dieting is a habit far from exclusive to humans．"As yet，we lack a complete understanding of how widespread the voluntary reduction of food intake is in nature，" the researchers comment．"Data on human dieting suggests that，while humans generally diet to improve health or increase attractiveness，rarely does it improve long-term health and males regularly prefer females that are fatter than the females' own ideal．"

小题1:When a goby grows to within 5-10% of the size of its larger competitor，it _________．

A．leaves the group itself

B．has breeding rights

C．eats its competitor

D．faces danger小题2:The underlined words "the evicted fish" in Paragraph 3 refer to _________．

A．the fish beaten up

B．the fish driven away

C．the fish found out

D．the fish fattened up小题3:The experiment showed that the smaller fish _________．

A．fought over a feast

B．preferred some extra food

C．challenged the boss fish

D．went on diet willingly小题4:What is the text mainly about?

A．Fish dieting and human dieting．

B．Dieting and health．

C．Human dieting．

D．Fish dieting．

骨折临床愈合后，骨痂的改造塑形决定于（）。

A.外固定的牢固性

B.肢体活动和负重所形成的应力

C.局部血液供应情况

D.骨痂的多少

E.是否配合治疗