均匀长木板放在水平桌面上如图,厚度不计,它的一端与桌边相齐.已知木板质量为2Kg

题型:问答题

问题:

均匀长木板放在水平桌面上如图,厚度不计,它的一端与桌边相齐.已知木板质量为2Kg,长度L=40cm,与桌面间动摩擦因数.今用水平推力将其推出桌子,问怎样施力可使水平推力做的功最少?最少的功为多大?你能写出几种方案?(g取10m/s2

考点:
题型:问答题

某英文杂志社就“建立和谐家园、和谐社会”主题征文。请以

“My family and I”为题,为该报社写一篇文章。短文应包括以下要点:

1、家庭成员及其基本情况。

2、家庭成员对你的关心、帮助和理解。(举一例说明)

3、家庭对你的重要性。

注意:1、词数:80词左右。   2、文章中不能出现学校、姓名等个人信息。

题型:问答题

下列各项中,不属于上焦病证的是()。

A.邪袭肺卫

B.邪陷心包

C.湿热阻肺

D.肝阳上亢

E.邪热壅肺

题型:问答题

将修道院制度和教士融合在一起的是()。

A、圣阿撒那修斯

B、圣巴歇尔

C、鲍依修斯

题型:问答题

一般均衡分析(General equilibrium analysis)

题型:问答题

阅读理解。

     请认真阅读下列短文,并根据所读内容在文章后表格中的空格里填入最恰当的单词。注意:每空

格1个单词。

     Quality after-school programs are designed to improve academic performance, decrease youth crimes and

other high-risk behaviors, and help young people grow into healthy, successful adults.

     The effect of quality after-school programs on academic performance is clear. Studies show that students

who take part in such programs show better work habits, higher rates of homework completion, improved

grades, and higher scores on achievement tests. They also have fewer absences and are less likely to blame.

After-school programs also influence high-risk teen behavior. Various studies show decreased rates of crime,

drug use, and teen sex among youth who join in well-run after-school programs when compared to similar

youth who do not. Finally, after-school programs play an important role in supporting the following fields of

development: physical development, mental development and social development. Thus, one can safely say that

after-school programming is an effective method to help young people become contributing members of society.

     Although there is enough proof from both small and large assessments that after-school programs can make

a positive difference, it is important to note that not all programs are equal. First, dosage (时量) matters-young

people who attend the most hours over the most years benefit more than members who attend less often or

over a shorter period of time. Next, after-school programs make bigger difference for those students who need

help most and have the fewest choices. Finally, program qualities matter. After-school programs work best

when they create unique opportunities for youth. They should provide opportunities for positive relationships,

skill building, meaningful involvement (参与), expression, suggestion, service, and work. Staff characteristics

make an important difference in the quality of a program. The adults should treat youth as partners, create safe

and fair environments, encourage personalized (个性化的) involvement, and actively create learning

opportunities. In short, although after-school programs have promising future, how they are designed and run

matters.

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