一个平行四边形的周长为24cm,两邻边之比为2:1,则它的各边长为______.

题型:填空题

问题:

一个平行四边形的周长为24cm,两邻边之比为2:1,则它的各边长为______.

考点:平行四边形的性质
题型:填空题

某城市里修建一条快速干线,正在考虑两条备选路线,沿河路线与穿山路线,两条路线的平均车速都提高了50千米/小时,日平均流量都是6000辆,寿命均为30年,且无残值,基准收益率为12%,其他数据如表2.1所示。

问题1.试用全生命周期费用分析法比较两条路线的优劣,并做出方案选择(计算结果保留两位小数)。

题型:填空题

在概念模型中,客观存在并可以相互区别的事物称为( )。

A.码

B.属性

C.联系

D.实体

题型:填空题

分析如下两个场景的环境创设场景一:某幼儿园的运动场上摆放着攀爬网、独木桥、高跷、跳袋、推车等运动器具,小朋友们自由选择好器具后开始玩了起来。通过观察发现攀爬网、独木桥被冷落,较少幼儿喜欢玩。过了一会,一个叫圆圆的幼儿对好朋友哲哲说:"我们一起去玩攀爬网好吗?"哲哲皱着眉头说:"不要,我害怕。"圆圆又指着稍矮一些的独木桥说:"那我们一起去玩那边的独木桥吧,这个矮一点,你该不怕了吧!"哲哲还是一脸为难的样子说:"我不想去,还是你自己去吧。"说着就去玩小推车了。就这样圆圆只能独自一人去玩了……一连许多日子,虽然老师在不断地鼓励幼儿,但是运动时段里像圆圆那样去攀爬网运动的小朋友较其他地方的要少许多。场景二:在提供的运动器械的基础上,幼儿教师们增加了一些小道具:如瓢虫帽子、软布小花、软塑积木、用纸板箱制作的猫咪、钓竿及幼儿绘画的小鱼等,创设出给小猫喂鱼(设置了独木桥)、瓢虫种花(设置了攀爬网)、造高楼等游戏情景。经过观察发现,这三项活动参与的幼儿人数不相上下。有意地观察了圆圆和哲哲,起先是圆圆邀请哲哲:"我们去抓鱼给小猫吃好吗?"哲哲欣然应允,两人打扮成捕鱼人,提着鱼篓,手拉手跑了过去。这次哲哲勇敢地蹲在窄窄的独木桥上,努力地抓起了一条大鱼,当他把鱼喂进小猫的嘴里时,脸上露出开心的笑容。接着他主动对圆圆说:"我们去当小瓢虫好吗?"他们一同来到了瓢虫种花的地方,戴上瓢虫帽,把自己装扮成小瓢虫,背上负重的小包,勇敢地向"小山"(攀爬网)跑去……

两个场景中的环境设计有何不同,你赞同哪一种设计,说明理由。

题型:填空题

My father was a foreman of a sugar-cane plantation(甘蔗种植园) in Rio Piedras, Puerto Rico. My first job was to drive the oxen that ploughed(耕) the cane fields. I would walk behind an ox(牛), guiding him with a broomstick. For $ 1 a day, I worked eight hours straight, with no food breaks.

It was very tedious work, but it prepared me for life and taught me many lasting lessons. Because the plantation owners were always watching us, I had to be on time every day and work as hard as I could. I’ve never been late for any job since. I also learned about being respectful and faithful to the people you work for. More important, I earned my pay; it never entered my mind to say I was sick just because I didn’t want to work.

I was only six years old, but I was doing a man’s job. Our family needed every dollar we could make because my father never earned more than $ 18 a week. Our home was a three-room wood shack with a dirty floor and no toilet. Nothing made me prouder than bringing home money to help my mother, father, two brothers and three sisters. This gave me self-esteem(自尊心), one of the most important things a person can have.

When I was seven, I got work at a golf course(高尔夫球场) near our house. My job was to stand down the fairway and spot the balls as they landed, so the golfers could find them. Losing a ball meant you were fired, so I never missed one. Some nights I would lie in bed and dreamt of making thousands of dollars by playing golf and being able to buy a bicycle.

The more I dreamed, the more I thought. Why not? I made my first golf club out of guava limb(番石榴树枝) and a piece of pipe. Then I hammered an empty tin can into the shape of a ball. And finally I dug two small holes in the ground and hit the ball back and forth. I practiced with the same devotion and intensity. I learned working in the field — except now I was driving golf balls with club, not oxen with a broomstick. 

小题1:The word “tedious” in Paragraph 2 most probably means _______.

A.easy

B.boring

C.interesting

D.unusual小题2:The writer learned that_______ from his first job.

A.he should work for those who he liked most

B.he should work longer than what he was expected

C.he should never fail to say hello to his owner

D.he should be respectful and faithful to the people he worked for小题3:_______ gave the writer self-esteem.

A.Having a family of eight people

B.Owning his own golf course

C.Bringing money back home to help the family

D.Helping his father with the work on the plantation

题型:填空题

架空人车信号工要()进入工作场所,现场交接班。

A.提早

B.稍迟

C.准时

D.拖拖拉拉

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