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该表内容为某年中日美英四国人均能源消费和人均二氧化碳排放量的有关数据，回答4-5题。

 人均能源消费（世界平均为100）人均二氧化碳排放量（吨）
美国47820
日本24111.6
英国2379.2
中国53.62.8
小题1:下列叙述中正确的是 

A．排入大气中的二氧化碳等气体能强烈吸收太阳辐射中的红外线使气温增高

B．目前大气中二氧化碳浓度不断上升，人为排放的二氧化碳增多是惟一原因

C．加强国际合作，发达国家承担首要任务是控制全球变暖的措施之一

D．经济发展的必然结果就是环境遭到人为破坏小题2:为控制全球“温室效应”问题，下列生产部门应该着重治理和改造的是 

A．印刷厂　

B．水电站

C．火力发电厂　　

D．服装厂

答案

小题1:C

小题2:C

小题1:排入大气中的二氧化碳等气体能吸收地面辐射，增强大气逆辐射，从而使大气增温；目前大气中二氧化碳浓度不断上升，人为排放的二氧化碳增多是主要原因但不是惟一原因；加强国际合作，发达国家承担首要任务是控制全球变暖的措施之一；经济发展的同时可以做到对环境的保护。

小题2:火力发电厂会产生二氧化碳等气体，所以应该着重治理和改造。

解答题
在平面直角坐标系xOy中，曲线C1的参数方程为
x=cosφ
y=sinφ
（φ为参数），曲线C2的参数方程为
x=acosφ
y=bsinφ
（a＞b＞0，φ为参数）在以O为极点，x轴的正半轴为极轴的极坐标系中，射线l：θ=α与C1，C2各有一个交点．当α=0时，这两个交点间的距离为2，当α=
π
2
时，这两个交点重合．
（I）分别说明C1，C2是什么曲线，并求出a与b的值；
（II）设当α=
π
4
时，l与C1，C2的交点分别为A1，B1，当α=-
π
4
时，l与C1，C2的交点为A2，B2，求四边形A1A2B2B1的面积．
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完形填空

Many solutions we seek with regard to achieving sustainability(可持续性) are within our reach. That’s the lesson our school’s Environment Club has learned over the past two years. We’ve reduced the amount of our waste at our school by 25 per cent. ___小题1:___ We have the evidence we need to suggest we are making a difference. If you are interested in leading your school on a similar journey of change, here are some tips.

__小题2:___

Examine the garbage can to find out how much of your school’s garbage could be picked out from the waste stream and be reused. We found that more than 80 percent of our waste could have been reused, recycled or composted(制成堆肥).

Prepare dustbins there.

___小题3:___ You will find you can cover the cost of the purchase of the dustbins within a few months simply by selling the bottles and other items you collect.

Compost the waste.

Start a composting system in your school. You may reduce your waste by as much as 50 percent. Be sure to talk with your teachers and your cafeteria staff to get them onside.

Share your success.

Let your community know what you’ve accomplished. __小题4:__ Ask your teachers if you can talk to their classes, let your parent group know what you’re doing, and present a report to the president of your school.

__小题5:___

Whether you spend a few moments in a quiet place or the whole day walking along a beautiful beach, time outdoors will remind you why the work you do for the environment is so worthwhile.

A．Dig in.

B．Reward yourself.

C．Do outdoor activities.

D．They’ll feel proud of you.E. We need to go further, and we will.

F. Invite your friends to join your cause.

G. Make sure every classroom has dustbins for recycling.
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