对于告知的形式，我国一般采取()方式。A.无限告知 B.有限告知 C.询问回答告知

关于根管消毒，错误的是（）

A.根管系统的复杂性决定了根管消毒的必要性

B.根管内封药消毒的时间越久越好

C.根管封药时间一般为5～7天，症状较重者可更换封药

D.应对根尖周组织无明显刺激

E.不应造成牙体变色

全国人民团结奋进的共同政治基础是[ ]

A、以经济建设为中心

B、坚持改革开放

C、坚持四项基本原则

D、坚持科教兴国

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 new breed of environmental activists differed from the previous activists in that ______.

A．they noticed environmental disparities between the rich and the poor

B．they cried for government intervention in saving the environment

C．they knew what "the environment" really meant to the White people

D．they practiced environmentalism outside as well as within the U. S.

血吸虫病肝硬化晚期、脾大及脾功能亢进病人，外科手术治疗以哪一种术式为好（）

A.脾切除+门腔静脉吻合术

B.脾切除+脾肾静脉吻合术

C.脾切除+贲门周围血管离断术

D.脾切除+胃冠状静脉栓塞术

E.单纯脾切除术

s1和s2已正确定义并分别指向两个字符串。若要求：当s1所指字符串大于s2所指字符串时，执行语句S；则以下选项中正确的是( )。

A．if(sl＞s2)S；

B．if(strcmp(s1,s2))S；

C．if(strcmp(s2,s1＞0)S；

D．if(strcm(s1,s2)＞0)S；