问题 单项选择题

下面关于窗体的作用叙述错误的是( )。

A.可以接收用户输入的数据或命令

B.可以编辑、显示数据库的数据

C.可以构造方便、美观的输入/输出界面

D.可以直接存储数据

答案

参考答案:D

问答题

小丽在研究一定质量的气体的压强时,想到了这样一个问题,如果使这些气体的体积保持不变,它的压强会不会随着温度的变化而变化呢?针对这一问题,她经过思考,提出了两种猜想:

①气体在体积不变时,温度越高,压强越大;②气体在体积不变时,温度越高,压强越小.

究竟哪一种猜想是正确的呢?小丽进行了如下实验:在烧瓶中封入一定质量的某种气体,烧瓶的一端连接在压强计上,将烧瓶放入水中,通过温度计可以测得水的温度,也就是瓶中气体的温度(如图所示).给水槽中的水加热,通过不断调整压强计以保持瓶中气体体积不变,并通过温度计和压强计每隔一段时间记录瓶

中气体的温度值及相应的压强值,经过一段时间,实验数据记录如下:

气体的温度(℃)20304050
气体的压强(Pa)1.0×10510.3×1051.07×1051.1×105
小丽对上述数据进行了归纳分析,初步验证了自己其中一种猜想的正确.

(1)小丽初步得出的结论是:______.

(2)在夏天,小丽将自行车车胎中气打得足足的,准备出去游玩.路上遇到同学小明,于是她就将自行车停放在烈日下,与小明聊天.忽然,猛听“砰”的一声巨响,车胎爆裂,这是怎么回事?请你用刚才探究出的结论解释一下.

(3)小丽探究出的这个结论在日常生活中有何应用?请列举一例.

(4)小丽是按照怎样的思维程度进行探究活动的?

阅读理解

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The Winners Club is a bank account specially designed for teenagers. It has been made to help you better manage your money. The Winners Club is a transaction account(交易账户)where you receive a key-card so you can get to your money 24/7 – that’s 24 hours a day, 7 days a week!

It’s a club with impressive features for teenagers:

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小题1:The Winners Club is a bank account intended for ________.

A.parents

B.winners

C.teenagers

D.adults小题2:Which of the following is TRUE about the Winners Club?

A.Special gifts are ready for parents.

B.The bank opens only on work days.

C.Services are convenient for its members.

D.Fees are necessary for the account keeping.小题3:The Winners Club provides magazines which ________.

A.encourage spending

B.are free to all teenagers

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A.be an Internet user

B.be in your twenties

C.have a big sum of money

D.be permitted by your parent or guardian.