在3x+2y=4中，用含x的代数式表示y，可得______．

Pollution means adding dirty or harmful things to land, air, water and so on. As a result, they are no longer pleasant or safe to use. Pollution is bad for animals and plants, and it even makes people’s health in danger. In our daily life, we can see different kinds of pollution in many places. There are three main forms of pollution: land pollution, air pollution and water pollution. 

Land pollution is caused by solid waste, such as cans, bottles and some plastic things which aren’t broken down quickly. It makes the environment look very bad. However, air pollution is more serious than land pollution. It is much worse in cities and towns because of the fumes(废气) from traffic and the waste from human activities. When people drive their cars, fumes which are most made up of CO2, NO2 and SO2 are given off. After the gases get into the air, they may mix with clouds. Then they will become some harmful chemicals (化合物) falling on the ground with rain. It is one of the reasons for soil erosion (土壤侵蚀) which is one example of water pollution.

Various kinds of pollution will cause many health problems. People have realized they must change this serious situation. There are many ways to control pollution. To develop alternative energy is very popular in many countries. China, for example, has made up its mind to be a leader in this field. It is trying hard to make full use of energy from the sun and wind. It has paid plenty of money to make electric cars and trains instead of traditional traffic. We should also take action to make our environment cleaner every day. Take cloth bags while going shopping and drive cars less. We have only one earth. We must take steps now to help protect our environment for the future wherever we are.

小题1:How many main forms of pollution are mentioned in the passage?

A．Two.

B．Three.

C．Four.

D．Five.小题2:Why is air pollution much worse in cities and towns?

A．Because of the cans and bottles that people throw away.

B．Because of the plastic things which aren’t broken down quickly.

C．Because of the fumes made up of SO2, CO2 and O2.

D．Because of the waste from human activities and the fumes from traffic.小题3:Which of the following is TRUE according to the passage?

A．Pollution hardly does harm to humans.

B．China doesn’t want to develop alternative energy.

C．Air pollution will cause soil erosion and water pollution.

D．Land pollution is only caused by solid waste.小题4:To make our environment cleaner, we shouldn’t __________.

A．use cloth bags while shopping

B．ride a bike to school

C．drive a car out every day

D．go to work on foot小题5:The main idea of this passage is _________.

A．to introduce different forms of pollution and ways to control it

B．to introduce the harmful chemicals and the solid waste

C．to introduce the alternative energy and the ways to use it

D．to introduce the electric cars and traditional traffic

从邓 * * 同志首先提出物质文明、精神文明的“两个文明”建设后，中共在此基础上提出经济、政治、文化建设的“三位一体”理念，党的十七大上又将包含经济、政治、文化、社会建设“四位一体”的中国特色社会主义事业总体布局写人党的章程。中共十八大将生态文明建设与经济建设、政治建设、文化建设、社会建设并列，“五位一体”地建设中国特色社会主义。上述材料说明：①追求和获得真理的过程实质就是一个不断进行的量变积累过程  ②真理具有具体性和条件性，追求真理是一个无限、反复的过程  ③真理与谬误总是相伴而行，而实践始终是二者转化的唯一条件  ④随着社会实践深人发展，人们会获得更多、更丰富的理性认识

A．①②

B．①③

C．②④

D．③④

出血性疾病

A．咯血颜色鲜红

B．铁锈色血痰

C．砖红色胶冻样粘痰

D．粉红色乳样痰

E．粉红色浆液性泡沫样痰

事务文书不包括( )。

A．制度

B．计划

C．总结

D．大事记

“祖国的宝岛，我可爱的家乡......辽阔的海域无尽的宝藏......”根据材料分析回答问题。

小题1:黄岩岛是我国的固有领土。图中，表示黄岩岛的是

A．甲岛

B．乙岛

C．丙岛

D．丁岛小题2:2012年5月，我国首座深水钻井平台在南海首钻成功，其重要意义在于

①宣示我国对南海的主权

②行使对钻井平台周边我国海域的管辖权

③解决我国目前石油对外依存度过高的问题

④标志我国能够独立进行深海油气资源开发

A．①②③

B．①②④

C．①③④

D．②③④