调节第二印刷时出现的周向误差时，要使齿轮与（）套脱开来改变印刷辊周向位置。A.联接

根据症状和体征提示有胸腔积液时，需确定是否有胸腔积液时首选的检查是（）

A.胸片

B.超声波

C.胸部CT

D.胸部MRI

E.血常规

阅读理解

     Experts say that agriculture provides fourteen percent of the world's greenhouse gas emissions each

year. The gases released include carbon dioxide, a major cause of global warming.

     Twenty-one nations around the world recently joined forces to better understand and prevent

greenhouse gas emissions from farms. The Global Research Alliance on Agricultural Greenhouse Gases

was launched at the United Nations conference on climate change. The meeting took place in

Copenhagen, Denmark last month.

     Agricultural experts blame a number of farm activities for producing greenhouse gases. For

example, animal waste and cattle digestive systems release methane(甲烷, 沼气)gas. Fertilized soil

and the burning of crop waste also release harmful gases into the air. Experts say some methods of

farming-turning the soil to prepare for planting-also release harmful carbon dioxide.

     An official of the European Commission's Directorate General for Research says agricultural

greenhouse gas emissions can be cut. Maive Rute suggests feeding animals a diet designed to reduce

emissions.

     The new agricultural research group says protecting against global warming is only part of its

purpose. It says the world also needs to develop better farming methods to feed growing populations

in poor countries.

     United States Agriculture Secretary Tom Vilsack said no one single nation can fight agricultural

greenhouse gas emissions and increase food production at the same time. This is why the alliance is

important for combining resources and finding new ones.

     The United States Department of Agriculture will increase spending on farm emissions research by

ninety million dollars over the next four years. The total will reach one hundred and thirty million dollars.

The U. S. D. A. will share the research with other countries in the Global Research Alliance on

Agricultural Greenhouse Gases and support researchers from developing countries that belong to the

alliance. Money from the Borlaug Fellowship Program will let the researchers study agricultural climate

change with American scientists.

     Mister Vilsack said that just as climate change has no borders, there should be no borders for

research.

1. In Paragraph 4, Maive Rute recommends __________.

A. increasing food production

B. changing cattle digestive systems

C. developing better farming methods

D. giving animals the food meant to produce fewer emissions

2. The underlined word "alliance" in Paragraph 6 probably means __________.

A. action or state being joined together

B. an agreement signed between countries

C. a program or project set up for a research

D. an organization formed for different goals

3. How much has the U. S. D. A. spent on farm emissions research so far?

A. 130 million dollars.  

B. 220 million dollars.

C. 40 million dollars.  

D. 90 million dollars.

4. The purpose of the passage is to __________.

A. suggest a total ban on farm activities

B. introduce the Copenhagen conference held last month

C. appeal to more countries to cut agricultural emissions

D. inform readers of the major cause of global warming

锅炉、压力容器、电梯、起重机械、客运索道、( )的维修单位，应当经省、自治区、直辖市特种设备安全监督管理部门许可，方可从事相应的维修活动。

A．中小型游乐设施

B．各种游乐设施

C．大型游乐设施

D．危险游乐设施

下面是关于Pentium微处理器实地址模式和虚拟8086模式的描述，其中错误的是 ( )。

A．这两种模式总是具有相同的物理地址空间

B．在这两种模式下都可以运行16位应用程序

C．虚拟8086模式具有保护机制，而实地址模式下无此功能

D．虚拟8086模式下的程序在最低特权级3级上运行，而实地址模式下运行的程序不分特权级

在非碱性水中，有非碳酸盐硬度存在。（）