试简述生化需氧量，化学耗氧量和总需氧量？

   Travelling from England to Scotland you _______.

A．needn’t a passport

B．don’t need to have a passport

C．needn’t to take a passport

D．don’t need take a passport

指出哪一种输液为代血浆输液的种类

A．复方氯化钠注射液

B．葡萄糖注射液

C．山梨醇注射液

D．静脉脂肪乳注射液

E．羟乙基淀粉注射液

将-两个或两个以上-的电阻，用导线依次首尾相联，称为（）。

十八大报告指出，全而准确贯彻“一国两制”、“港人治港”、“澳人治澳”、高度自治的方针，必须把坚持一国原则和尊重两制的差异、维护中央权利和保障特别行政区高度自治权、发挥祖国内地坚强后盾作用和提高港澳自身竞争力有机结合起来，任何时候都不能偏废。这体现的哲学道理是

A．分析事物要坚持两点论和重点论的统一

B．关键部分的功能对整体功能起决定作用

C．事物的性质是由矛盾的主要方面决定的

D．世界观揭示了事物本质和最普通的规律

Almost every day the media discovers an African American community fighting some form of environmental threat from land fills, garbage dumps, petrochemical plants, refineries, bus depots, and the list goes on. For years, residents watched helplessly as their communities became dumping grounds.
But citizens didn’t remain silent for long. Local activists have been organizing under the mantie of environmental justice since as far back as 1968. More than three decades ago, the concept of environmental justice had not registered on the radar screens of many environmental or civil rights groups. But environmental justice fits squarely under the civil rights umbrella. It should not be forgotten that Dr. Martin Luther King Jr. went to Memphis on an environmental and economic justice mission in 1968, seeking support for striking garbage workers who were underpaid and whose basic duties exposed them to environmentally hazardous conditions.
In 1979, a landmark environmental discrimination lawsuit filed in Houston, followed by similar litigation efforts in the 1980s, rallied activists to stand up to corporations and demand government intervention.
In 1991, a new breed of environmental activists gathered in Washington, D.C. , to bring national attention to pollution problems threatening low-income and minority communities. Leaders introduced the concept of environmental justice, protesting that Black, poor and working-class communities often received less environmental protection than White or more affluent communities. The first National People of Color Environmental Leadership Summit effectively broadened what "the environment" was understood to mean. It expanded the definition to include where we live, work, play, worship and go to school, as well as the physical and natural world. In the process, the environmental justice movement changed the way environmentalism is practiced in the United States and, ultimately, worldwide.
Because many issues identified at the inaugural summit remain unaddressed, the second National People of Color Environmental Leadership Summit was convened in Washington, D.C. , this past October. The second summit was planned for 500 delegates ; but more than 1,400 people attended the four-day gathering.
"We are pleased that the Summit Ⅱ was able to attract a record number of grassroots activists, academicians, students, researchers, planners, policy analysts and government officials. We proved to the world that our movement is alive and well, and growing," says Beverly Wright, chair of the summit. The meeting produced two dozen policy papers that show powerful environmental and health disparities between people of color and Whites.

The word "protesting" underlined in Paragraph 4 is closest in meaning to ______.

A．combat

B．confirm

C．consider

D．affirm