阴凉处是指 A.5C B.10C C.15C D.不超过20℃ E.不超过10℃

题型:单项选择题

问题:

阴凉处是指

A.5C
B.10C
C.15C
D.不超过20℃
E.不超过10℃

考点:西药执业药师药物分析药典知识(一)
题型:单项选择题

上颌窦开口于 ( )

A.上鼻道

B.中鼻道

C.下鼻道

D.蝶筛隐窝

E.鼻前庭

题型:单项选择题

在下列各组所说的两个现象中,都表现出光具有粒子性的是  [ ]

A.光的折射现象、偏振现象

B.光的反射现象、干涉现象

C.光的衍射现象、色散现象

D.光电效应现象、康普顿效应

题型:单项选择题

当温度升高时半导体的导电能力会()。

A.减小

B.增加

C.不变

D.不能确定

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

患者男性,75岁,诊断为慢性呼吸衰竭,表现为呼吸困难,发绀明显,血气分析结果为PaO2 45mmHg、PaCO2 72mmHg,该患者应

A.高浓度、高流量持续吸氧
B.高浓度、高流量间歇吸氧
C.低浓度、低流量持续吸氧
D.低浓度、低流量间歇吸氧
E.酒精湿化吸氧

更多题库