数学处理是根据加工图样，按照已经确定的加工路线和允许的编程（），计算数控系统所需要输

近年来青少年犯罪率呈上升趋势，出现低龄化、智能化、团伙性和暴力性等特点。为预防未成年人犯罪，使未成年人健康成长，我国制定的一部专门法律是[ ]

A．义务教育法

B．未成年人保护法    

C．预防未成年人犯罪法    

D．宪法

解释下列句子中的加点字。( 7分)

9．

（1）诚不自意返吾衣冠。    （《指南录后序》）      （       ）

（2）人皆得以隶使之。      （《五人墓碑记》）      （       ）

（3）晋军函陵，秦军氾南。  （《烛之武退秦师》）    （       ）

（4）能克终者盖寡。        （《谏太宗十思疏》）    （       ）

（5）徒见欺。              （《廉颇蔺相如列传》）  （       ）

（6）旦日不可不蚤自来谢项王。（《鸿门宴》）          （       ）

（7）无乃尔是过与。        （《季氏将伐颛臾》）    （       ）

Don’t you just love ice skating every winter？I am sure，that since winter is approaching，your skates are set to come out，just waiting to be used.Impress your friends with your new trick on how to ice­skate backwards with the help of these tips.Skating backwards on ice is a bit difficult but once you master the basic，there’s nothing like it.Follow the steps given below and you will be able to skate backwards in no time.

Stand Straight

The first thing that you need to do is，stand straight.If you feel that you are falling backwards，then just put your chin(下巴) up and slightly bend your knees.Don’t worry；this happens to all.

Confidence Is What You Need

The most important step while learning how to skate backwards，is having enough confidence in yourself and in what you are doing.How can you achieve this？By practice.Just practice rolling backwards down a gentle slop every single day or just by pushing off from a wall or something of that sort.But before you do that，make sure that the place where you are practicing is free from any kind of debris(碎片) because otherwise，you could land up in the hospital due to some accident.While going backwards，just get used to the feeling of moving backwards.One of the important ice skating tips and techniques is that if you feel that you are losing your balance，then scissor(做剪式运动) your skates.Keep practicing this till you are confident about it.

Maintain Speed

Confident now？Great！Now the next step is to maintain your speed.While rolling in a straight line with one skate，with the other try sculling(划桨)，that is，keep pushing yourself backwards with an outwards stroke(滑动)．Now bring the skate which you were using to scull，and then again，repeat the same process.Make sure that you put most of your weight on the skate which is moving straight and not the one with which you are sculling.Now，try the same thing using the other foot.Again keep doing this till you are confident enough.

Increase Your Speed Now

Once you are confident that you can scull with either foot，the next thing that you have to do is increase your speed.Try some of your own tricks now.Scull with either foot or with both at the same time.

Scull and Be Aware

While you keep one foot straight，keep sculling with the other.You can do that simultaneously with both feet.Concentrate on what you are doing but don’t get so involved，that you don’t see where you are going.If you are not watching your back，you might just bang against something or someone.

小题1:According to the text confidence comes from ______.

A．high speed

B．strict coaches

C．constant exercise

D．good techniques小题2:Which is the right order of ice­skating backwards?

a．Increasing your speed.

b．Being able to scull with one foot.

c．Being about to stand straight.

d．Trying some different tricks.

A．c→a→d→b

B．c→b→d→a

C．a→c→b→d

D．c→b→a→d小题3:In order to keep balance when skating backwards you should ________.

A．skate in a scissor gesture

B．use both your feet to scull

C．skate forward first and then backward

D．put most of your weight on the skate with which you are sculling小题4:The purpose of the text is ________.

A．to compare different ways of ice­skating backwards

B．to introduce the culture of ice­skating backwards

C．to explain advantages of ice­skating backwards

D．to offer some advice on ice­skating backwards

选择回溯建库的正确流程：（）

A.图书归类整理→贴条形码→录入馆藏信息→打印书标（索书号）、贴书标

→图书排架上架

B.录入馆藏信息→图书归类整理→贴条形码→打印书标（索书号）、贴书标

→图书排架上架

C.图书排架上架→贴条形码→录入馆藏信息→打印书标（索书号）、贴书标

→图书归类整理

D.贴条形码→图书归类整理→录入馆藏信息→打印书标（索书号）、贴书标

→图书排架上架

关系规范化的过程是通过对初始关系模式的逐步______来实现的，