等离子弧焊必须对电极及喷嘴进行有效的水冷却,冷却水的流量不得小于( )。A.2 L

题型:单项选择题

问题:

等离子弧焊必须对电极及喷嘴进行有效的水冷却,冷却水的流量不得小于( )。

A.2 L/min

B.3 L/min

C.6 L/min

D.8 L/min

考点:造价工程师建设工程技术与计量(安装)建设工程技术与计量(安装工程部分)38
题型:单项选择题

急性肾盂肾炎尿检常见表现为|

A.白细胞尿

B.肉眼血尿

C.糖尿

D.蛋白尿

E.结晶尿

题型:单项选择题

事实前提的特点主要表现在客观性、可检验性和( )。

A.主观性

B.选择性

C.变动性

D.预见性

题型:单项选择题

The first mention of slavery in the statutes of the English colonies of North America does not occur until after 1660--some forty years after the importation of the first Black people. Lest we think that slavery existed in fact before it did in law, Oscar and Mary Simon assure us that the status of Black people down to the 1660’s was that of servants. (46) A critique of the Simons’ interpretation of why legal slavery did not appear until the 1660’s suggests that assumptions about the relation between slavery and racial prejudice should be reexamined, and that explanations for the different treatment of Black slaves in North and South America should be expanded.
(47) The Simons explain the appearance of legal slavery by contending that, during the 1660’s, the position of White servants was improving relative to that of Black servants. Thus, the Simons argue, Black and White servants, heretofore treated alike, each attained a different status. There are, however, important objections to this argument. First, the Simons cannot adequately demonstrate that the White servant’s position was improving during and after the 1660’s; several acts of the Maryland and Virginia legislatures indicate otherwise. Another flaw in the Simons’ interpretation is their assumption that prior to the establishment of legal slavery there was no discrimination against Black people. It is true that before the 1660’s Black people were rarely called slaves. But this should not overshadow evidence from the 1630’s on that points to racial discrimination without using the term slavery. Such discrimination sometimes stopped short of lifetime servitude or inherited status--the two attributes of true slavery--yet in other cases it included both. (48) The Simons’ argument excludes the real possibility that Black people in the English colonies were never treated as the equals of White people.
This possibility has important ramifications. (49) If from the outset Black people were discriminated against, then legal slavery should be viewed as a reflection and an extension of racial prejudice rather than, as many historians including the Simons have argued, the cause of prejudice. In addition, the existence of discrimination before the advent of legal slavery offers a further explanation for the harsher treatment of Black slaves in North than in South America. (50) Frey and Terry have rightly argued that the lack of certain traditions in North America--such as a Roman conception of slavery and a Roman Catholic emphasis on equality--explains why the treatment of Black slaves was more severe there than in the Spanish and Portuguese colonies of South America. But this cannot be the whole explanation since it is merely negative, based only on a lack of something.

题型:单项选择题

2014年6月,《中共山东省委山东省人民政府关于推进新型城镇化发展的意见》正式印发,标志着我省城镇化建设进入一个全新的发展阶段。阅读材料,运用政治生活知识回答问题。

材料一:山东省省委领导班子通过街区走访、召开民主座谈会、网络民意调查等途径,集思广益,问计于民,形成了“以人为本、四化同步、优化布局、生态文明、文化传承”的新型城镇化道路的建议,提交省人大讨论并表决通过,为全省的城镇化发展指明了方向。

材料二:在推进城镇化过程中,有的地方政府把城镇化异化成了强征强拆的“圈地运动”,以不公平的补偿条件强制拆迁村民的房屋和宅基地。针对上述问题,某市人大代表张某深入社区、居民家庭和建筑工地,就强征强拆问题,为市民提供法律咨询和援助,并就市民高度关注、意见较大的问题形成议案,提交市人大。

结合材料,说明山东省委在推进城镇化过程中是如何发挥领导作用的。

题型:单项选择题

制硫装置在酸气量特别少的生产情况下,反应炉应采取措施是()。

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