现有CO、CO2、O3(臭氧)三种气体,它们分别都含有1mol氧原子,则三种气体

题型:选择题

问题:

现有CO、CO2、O3(臭氧)三种气体,它们分别都含有1mol氧原子,则三种气体的物质的量之比为(  )

A.1:1:1

B.1:2:3

C.3:2:1

D.6:3:2

考点:物质的量的有关计算
题型:选择题

原发性血小板减少性紫癜()

A.血清铁正常,网织红细胞明显增多

B.血清总铁结合力增高

C.骨髓增生程度减低,巨核细胞缺如

D.骨髓巨核细胞明显增多,以颗粒型居多

E.血清叶酸、维生素B12水平降低

题型:选择题

  If you ask people to name one person who had the greatest effect on the English language, you will get answers like“Shakespeare”,“Samuel Johnson”and“Webster”but none of these men had any effect at all compared with a man who didn't even speak English---William the Conqueror.

  Before 1066, in the land we now call Great Britain lived people belonging to two major language groups. In the west-central region lived the Welsh, who spoke a Celtic language, and in north lived the Scots, whose language, though not the same as Welsh, was also Celtic. In the rest of the country lived the Saxons, actually a mixture of Anglos-Saxons, and other Germanic and Nordic peoples, who spoke what we call Anglo-Saxon (or Old English), a Germanic Language. If this state of affairs had lasted, English today would be close to German.

  But this state of affairs did not last. In 1066 the Normans led by William defeated the Saxons and began their rule over England. For about a century, French became the official language of England while Old English became the language of peasants. As a result, English words of polities and the law come from French rather than German. In some cases, modern English even shows a distinction(区别) between upper-class French and lower-class Anglo-Saxon in its words. We even have different words for some foods, meat in particular, depending on whether it is still out in fields or at home ready to be cooked, which shows the fact that the Saxon peasants were doing the farming, while the upper-class Normans were doing most of the eating.

  When Americans visit Europe for the first time, they usually find Germany more“foreign”than France because the German they see on signs and advertisements seems much more different from English than French does. Few realize that the English language is actually Germanic in its beginning and that the French influences are all the result of one man's ambition.

46.The two major languages spoken in what is now called Great Britain before 1066 were _____.

  A. Welsh and Scottish          B. Nordic and Germanic

  C. Celtic and Old English        D. Anglo-Saxon and Germanic

  47.Which of the following groups of words are, by inference, rooted in French?

  A. president , lawyer, beef        B. president , bread, water

  C. bread , field, sheep          D. folk , field, cow

48.Why does France appear less foreign than Germany to Americans on their first visit to Europe?

  A. Most advertisements in France appear in English.

  B. they know little of the history of the English language.

  C. Many French words are similar to English ones.

  D. They know French better than German.

49.What is the subject discussed in the text?

  A. The history of Great Britain.  B. The similarity of Great Britain.

  C. The rule of England by William the Conqueror. D. The French influences on the English language.

题型:选择题

在企业总体战略中,主要的构成要素是______

A.经营范围和增长向量
B.增长向量和竞争优势
C.竞争优势和协同作用
D.经营范围和竞争优势

题型:选择题

下列关于职业道德的选项中,正确的是()。

A.职业道德的形式因行业不同而有所不同

B.职业道德在内容上具有变动性

C.职业道德在适用范围上具有普遍性

D.讲求职业道德会降低企业竞争力

题型:选择题

现场救护“生命链”指的是什么?

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