金属冷弯试验，冷弯角度越大，则钢材的（）越好。 A.塑性 B.硬度 C.冲击韧性

一个长方体的底面积是80cm²，高是7cm，它的体积是______cm³．

下列犯罪行为中，不属于不作为犯的有：

A．警察在值勤时见人行凶杀人，不予制止

B．有赡养能力的子女对父母不尽赡养义务，造成严重后果

C．某成年人带邻家小孩去游泳，在孩子溺水时不予抢救，致使孩子被淹死

D．过路人见交通事故的被害人躺在血泊中而不抢救

阅读理解。

     Baby girls make their way directly for dolls as soon as they can crawl,while boys will head for cars,a

study has shown.The findings,the first to show differences in very young babies,suggest there is a

biological basis to their preferences.

     Psychologists Dr Brenda Todd from City University London carried out an experiment involving 90

babies aged 9 months to 36 months.The babies were allowed to choose from seven toys.Some were

typically boys' toys-a car,a digger,a ball and a blue teddy.The rest were girls' toys: a pink teddy,a doll

and a cooking set.They were placed a meter away from the toys;and could pick whichever toy they liked

their choice and the amount of time they spent playing with each toy were recorded.

     Of the youngest children (9 to 14 months),girls spent significantly longer playing with the doll than

boys,and boys spent much more time with the car and ball than the girls did.Among the two and

three-year-olds,girls spent 50 percent of the time playing with the doll while only two boys briefly touched

it.The boys spent almost 90 percent of their time playing with cars,which the girls barely touched.There

was no link between the parents' view on which toys were more appropriate for boys or girls,and the

children's choice.

     Dr Brenda Todd said,"Children of this age are already exposed to much socialization.Boys may be

given'toys that go'while girls get toys they can care for,which may help shape their preference . But these

findings agree with the former idea that children show natural interests in particular kinds of toys.There

could be a biological basis for their choices.Males through evolution have been adapted to prefer:

moving objects,probably through hunting instincts(本能),while girls prefer warmer colors such as pink,

the colour of a newborn baby."                                

1.Baby boys and girls have different toy preferences probably because____

A. baby boys are much more active

B. baby girls like bright colours more  

C. their parents treat them differently

D. there is a natural difference between them

2. Both baby boys and baby girls like to play with____ according to the study.

A. a ball    

B. a teddy    

C. a car      

D. a doll   

3.What can we infer from Paragraph 3?

A. Nine-month-old baby boys don't play with dolls at all.

B. Two-year-old baby girls sometimes play with cars and balls.

C. The older the babies are,the more obvious their preference is.

D. Parents should teach their babies to share each other's toys.

4.What conclusion did Dr.Brenda Todd draw from the results of the study?

A. Adults purposely influence their babies' preference.

B. Babies' preference isn't affected by social surroundings.

C. Baby boys preferring to moving toys will be good at hunting.

D. Baby girls preferring warmer colors will be warm-hearted.

5.We may read this article in a______section of a newspaper.

A. science      

B. health        

C. education    

D. entertainment.

发布信息过程的输入包括（）。

A.工作绩效信息

B.工作绩效测量结果

C.绩效报告

D.信息发布工具

造成行政伦理失范的原因是多方面的，从行政人员自身的角度来看，最主要的原因就是行政人员社会角色的（）

A.唯一性

B.双重性

C.多重性

D.政治性