6502电气集中，执行组电路中，第8线检查的基本联锁条件是（）。A、道岔位置正确，进

阅读理解。

     DIY, which means Do It Yourself, is quite popular in UK. Lots of stores and supermarkets sell DIY

things. TV programmes show people how to DIY.

     English people like DIY. There is a saying in UK----"As Englishman's home is his castle". Huge

number of people spend their holidays making their homes beautiful "castles". If there is anything that

needs fixing around their homes, such as painting the walls or putting in a new shower, they will do the

jobs themselves. They share DIY experience with their friends. More and more people have discovered

the joy of DIY. Sometimes people also DIY for saving money. With the economic downturn at present,

many people can not afford a big house. They are looking at how they can make their house better

without spending a lot of money. It is not surprising that DIY is so popular.

     DIY can be difficult. There is a huge market for DIY furniture which people need to get together

themselves with a few basic tools. However, people often find it not easy to build a piece of furniture

because they can't understand the instructions. Sometimes the instructions are simple and clear, but the

furniture itself is difficult to build. One thing is for sure, though most DIY projects are started with the

best intentions. Many of them may not get finished. DIY can also be dangerous. For example, anything

electrical should be done by a professional worker. Unluckily, many people don't care about this warning

and put themselves in danger. It is reported that in just one year over 230,000 people were hurt while

doing DIY in UK, including 41,000 who fell off ladders.

     Therefore, DIY can bring us fun and help us save money, but it is not always as easy as it is thought

to be if we bite off more than we can chew. Maybe factories should make products that are easier and

safer for us to DIY.

1. How do many English people spend their hoildays to the passage?

A. Making their homes beautiful.        

B. Visiting their friends.

C. Travelling all over the world        

D. Making a lot of money

2.Why do English people like DIY?

A. Many stores sell DIY things.        

B. DIY can bring them fun.

C. TV programmes teach them to DIY      

D. All DIY projects are easy.

3.What can we learn from the passage?

A. DIY is a waste of money.            

B. it is always difficult to DIY.

C. We should be careful while doing DIY.

D. It is very safe for us to DIY.

4. In the passage, "we bite off more than we can chew" probably means      .

A .We can eat everything we like.      

B .We should do something difficult.

C .We do something that is too difficult.

D .We eat too much food that is not safe.

下列有关消毒灭菌原则的叙述错误的是（）

A.进入人体无菌器官的医疗用品必须灭菌

B.耐热、耐湿物品首选化学灭菌法

C.手术器具首选压力蒸气灭菌

D.室内空气消毒不宜选自然挥发的甲醛熏箱

E.接触皮肤黏膜的器具必须消毒

主要用于城市、矿山运输使用的轨钢为( )。

A．轻轨

B．重轨

C．起重钢轨

D．一般重轨

下列各组物质中，所含分子数相同的是

A．18g H₂O和14g N₂

B．5.6L O₂和11g CO₂

C．9g H₂O和0.5mol CO

D．224mL H₂(标准状况)和0.1mol N₂

某企业承担一个大型信息系统集成项目，在项目过程中，为保证项目质量，采取了以下做法，其中（）是不恰当的。

A.项目可行性分析、系统规划、需求分析、系统设计、系统测试、系统试运行等阶段均采取了质量保证措施

B.该项目的项目经理充分重视项目质量，兼任项目QA

C.该项目的质量管理计划描述了项目的组织结构、职责、程序、工作过程以及建立质量管理所需要的资源

D.要求所有与项目质量相关的活动都要把质量管理计划作为依据