手枪射击时出现不抛壳现象的原因可能是（）。 A.子弹、套筒（枪机）、弹膛及火药气体通

女，28岁，计划妊娠2年不孕，痛经3年，进行性加重，G₁P₀A₁L₀。查体：T36.0℃，肥胖体态；宫颈光滑，无举痛及摆痛，子宫2个月妊娠大小，质硬，左侧附件区可触及5～6cm直径大小囊性肿块，有轻微触痛。B超提示子宫10cm×7cm×5cm大小，后壁肌层回声不均质且血流信号增多，左附件区囊性肿物5cm，囊壁较厚，囊内液体可见细密光点。

为明确诊断兼顾治疗，最有价值的方法是（）

A.宫腔镜检查十输卵管通液术

B.B型超声十穿刺抽液

C.血CA125测定十剖腹探查

D.B超引导穿刺+3%的碘酊冲洗

E.腹腔镜检查十手术处理

F.宫腔镜检查+B型超声

当儿童的思维不具有可逆性时，其认知发展主要处在[ ]

A．感知运动阶段

B．前运算阶段

C．具体运算阶段

D．形式运算阶段

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 mantle 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.

搭设或拆除跨越架应设（）

A.专责监护人

B.工作许可人

C.工作票签发人

D.操作人

X：当一个罕见但严重的工业事故发生时，人们相信这样的事故正变得越来越频繁，这个认识是不理性的。毕竟，一手牌四个A是一个不寻常的事，几乎不能增加将来一手牌四个A的任何机会。Y：相反，这个认识是理性的；因为它导致人们感觉到一种以前从未感觉到的危险，并且采取预防行动来阻止将来发生类似事件。
Y试图反对X的主张，下列哪一个是最好地描述

A．它对X所作类比的合理性有疑问。
B．它显然表明X没有考虑到人们对一个严重事故反映怎样变化。
C．它将批评合理性的基础转移到效益的角度。
D．它提供了人们为什么形成错误的观念的一个可替代的解释。
E．它挑战X的假设，一个事件的发生足够改变一个信念。