软件生命周期是指( )的过程。A．软件系统开始研制到软件系统投入试运行 B．软件系统

How green are you? Do you care about protecting the environment and saving energy? We all need a healthy environment, but we produce waste every day and it does harm to our environment. Though we are young, we can still do something to help. In fact, even the simplest everyday activities can make a real difference to the environment. Here are some ideas for you. Remember these three words: Reduce, reuse and recycle.

REDUCE

Reduce means “use less.” Don’t waste things. This saves money and reduces pollution and waste going into the environment. Before we buy something new, think whether it is really necessary--- or maybe the old one will be just as good! When we do buy things, choose local produces if possible, and try not to buy too many things form abroad. It may cost a lot of money to bring them to us.

REUSE

Reuse means “use again.” Use things for as long as possible. When we buy things, make sure that they last a long time. We should look after them so that they will last, and we should repair them if we can instead of throwing them away and buying new ones. Don’t use a paper cup or a paper bag. It’s better to use a china cup and a lunch box because you can use them again.

RECYCLE

Recycle means “change things into something else.” Although it takes energy to change something into something else, it’s better than throwing things away or burning them. Find out what can be recycled in your neighbourhood and take part in recycling programmes. We should also buy products made from recycled materials, such as recycled paper, to help save trees.

小题1:Why is it better to choose local products if possible?

A．Things from abroad do harm to our environment

B．Local products are much cheaper

C．To choose local products means that we love our country

D．Things from abroad aren’t necessary小题2:According to the passage, when we find our clothes are out of fashion, what should we do?

A．Throw them away

B．If they are still suitable, keep them

C．Clean the floor with them

D．Give them to others and buy new ones小题3:What is the helpful activity in our daily life?

A．To shop with plastic bags

B．To use paper cups

C．To collect old newspapers

D．To burn fallen leaves小题4:According to the passage, which of the following is RIGHT?

A．We should learn to grow vegetables

B．People mustn’t produce waste any more

C．Children are too young to do anything to save energy.

D．The simplest everyday activities are important to protect our world.小题5:Which of the following is WRONG according to this passage?

A．Always buy new things and throw away old ones

B．Use china cups instead of paper cups

C．Recycle something that can be recycled

D．Think first when we want to buy something

以下每道试题有2～6个提问，每个提问有5个备选答案，请选择1个最佳答案。

选择后牙牙尖形态的主要考虑因素是

A．功能要求

B．支持组织的条件

C．对颌牙的情况

D．价格

E．美观

黑奴贸易所造成的影响主要有

①加速了西欧的资本原始积累 ②为美洲的开发提供了廉价劳动力 

③给非洲人民带来了无穷的灾难 ④促进了非洲的近代化

A．①②③

B．②③④

C．①③④

D．①②③④

免疫系统由（ ）、（ ）、（ ）三部分组成。

C级防雷器中压敏电阻损坏后其窗口颜色变（）。

A.红

B.橙

C.黄

D.绿